Why the geyser heats the water and the body strongly: how to prevent overheating

Reasons for strong heating of water by a column

• low pressure in the water supply

If, at a constant low water pressure, a powerful column is installed in the apartment, more than 11 l / min., of any brand: Nevalux, Bosch, Vaillant, Ariston, Electrolux, AEG, Baltgaz, Darina, etc. In this case, almost always, overheating occurs, since devices with high power are designed for good pressure, having a larger volume of the heat exchanger.If bad pressure is temporary, then the problem will also be temporary, until normal water supply is restored.

• blockages in the system

When clogging in the pipes, the water pressure drops, as a result, it overheats above the permissible temperature, due to which the equipment can even suddenly turn off.

• regulators set incorrectly

Water can overheat during the change of seasons winter - summer. After the onset of warming, the water coming from the communications becomes warmer, and there is a winter adjustment on the control panel: the gas supply regulator is at the maximum value, the water supply regulator is at the minimum, since the water in the cold season came from the water supply much colder. Therefore, with the onset of summer, it began to overheat.

The boiler does not heat water for heating

So, let's consider the main reasons why a gas boiler does not heat water for a heating system and what to do about it:

airlock. It is necessary to examine the heating system for the presence of air in the radiators. To eliminate this problem, you need to install an air vent. The principle of its operation is similar to the operation of an expansion tank, but it is able to maintain pressure in the system. Use an air vent to bleed air from the system.

It is important to inspect the valve itself for mechanical blockage - scale may be present there;
corrosion in radiators. You can determine the blockage of heating devices by draining water from the system

If the water flowed dirty, then you need to flush the system until visually clean water appears;
connection errors. Hot water may not flow if the diameter of the pipes is not the same as provided for by the project or instructions.It is necessary to check the compliance of the pipeline, the correct connection and the quality of the installation of valves;
insufficient network pressure. You should try to add water to the heating system, as there may not be enough pressure to trigger the automatic ignition of the burner;
the presence of scale in the heat exchanger. The first sign is the prolonged heating of the coolant and the heating of the batteries. It is necessary to get rid of deposits and carry out boiler water treatment. To do this, you need to disassemble the boiler, and dismantle the heat exchanger assembly.

Before this, you need to shut off the flow of gas and water to the device. Then, flexible connectors from the pump are connected to the heat exchanger and it is washed with a composition with a special cleaning agent, which can be purchased commercially. After that, the parts are washed with water.

It is important to understand that the addition of chemicals to the coolant prevents and reduces the appearance of deposits on parts. But before using the reagents, you need to read the instructions for the boiler, since some manufacturers, such as Ariston, Electrolux, Buderus, Navien or Arderia, do not provide for the use of chemical additives in the coolant

In this case, you can use water purification filters or distilled water.

Some manufacturers allow the use of antifreeze instead of water in the heating system. This substance can be used in the following boilers: Baxi, Vaillant, Proterm, Beretta, Korea Star. However, it should be understood that each manufacturer recommends using their own antifreeze;

• filter clogging. If the filter screens are clogged with mechanical debris, the radiators can also warm up poorly.Therefore, the filter should be regularly checked and cleaned by rinsing with water. If clogging occurs too often, then such a part must be replaced;
• wrong setting. First of all, with little or no heating, it is necessary to check the settings of the control unit. Insufficient temperature may be set and the gas does not heat the water;
• malfunctions of pumping equipment. If the pump power is not enough to ensure good circulation, then it may turn off when it overheats. This can happen when the DHW circuit is turned on;
• improperly selected heating devices. If radiators with inappropriate heat transfer parameters and design are installed in the system, this can also lead to weak heating;
• incorrect slope of pipelines. Most often this problem occurs in systems with natural circulation. Regulatory documentation specifies that the slope of the pipes should be from 10 mm per meter of pipe. In case of non-compliance with these requirements, circulation may be disturbed and, as a result, there will be no heating due to the low coolant flow.

Causes of problems

The column does not heat well, cold water flows from the tap? What could have happened:

• A thick layer of deposits on the outer walls of the heat exchanger (radiator). Soot and soot accumulate during operation: the thicker the mud layer, the more difficult it is to warm up the flow. This leads to the fact that the equipment "Neva", "Ariston" and other brands does not heat the contents.
• Weak flame in the burner. This means that the diaphragm is defective or worn out, therefore it does not create sufficient pressure on the gas valve.
• Radiator overheating. Impurities from the water supply are deposited on the walls and parts of the equipment in the form of scale.It is difficult for the radiator to give off heat to the environment, which leads to overheating.
• Insufficient pressure in the pipeline. You need to wait for recovery or contact the gas service.
• Late maintenance of equipment. Periodically, the parts need to be cleaned, as well as to check their performance.

Let us consider in more detail all the causes of the malfunction, ways to eliminate them.

Sources of the accident

There are several reasons for the failure of the burner, the main ones are the following factors:

1. Lack of traction.

For any model, be it the Neva, Oasis or Vector, the flame goes out or does not light up due to the fact that the chimney is often clogged with dust, dirt and foreign objects. In modern equipment, in this case, a protective valve is activated, which automatically shuts off the fuel supply to the gas column. This is because the products of combustion are not discharged in full and in accordance with the technical requirements.

To verify the malfunction, you need to check the traction. To do this, open a window and bring a lighted match or a sheet of paper to the pipe. If the chimney is clogged, the wind will not be felt, so the geyser does not light up. The cleaning of the combustion waste disposal system is carried out by specialists

It is important not to miss this moment, as the exhaust gas enters the room, which can lead to serious consequences.

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Sometimes the automation works when the hood is turned on, located nearby, the flame goes out or does not appear.If the device has a large power, it interferes with the removal of waste, so you should never install two units in one place, especially in small rooms.

2. Malfunction of sensors.

If the igniter flame goes out, it is necessary to inspect the device that controls the exhaust of gases. To do this, disconnect the wires and check the resistance using a special device. The indicator must be indicated in the passport, if it does not reach the optimal value, the sensor will have to be replaced. The burner goes out when the thermocouple breaks. In this case, the gas column does not ignite due to low voltage, the optimal parameter of which is 10 mV.

3. Discharged batteries.

The main function of the batteries is to keep the valve open during operation. The service life of the elements is no more than a year, therefore, manufacturers of such gas units as the Neva recommend changing batteries on time. In addition, the reason that the burner does not ignite may be a malfunction of the piezoelectric element or the power cable. It is necessary to disconnect the wires and check them for internal and external breaks. If there is still no spark, the column does not turn on, then the source of the problem is different.

4. Blockage of the inside.

If dirt and soot get into the gas supply tunnel from the fittings to the burner, the flame goes out or does not ignite. The injectors need to be cleaned. If the fuel pressure is not adjusted, a characteristic whistle will be heard, flame separation appears, then it disappears. Also, a burner of the wrong diameter can create such a malfunction.In this case, you need to correct the gas supply or replace the elements. When airing, the gas column ignites, but immediately goes out. To eliminate the defect, you need to unscrew the nut on the fitting and bleed the air, then return the mount to its place, fix it and check if the burner goes out.

5. Deformation of elements.

If the water is too hard, scale appears in the pipes, which gradually clogs the filters, so the gas unit goes out or does not turn on. The grate is taken out, thoroughly cleaned. If it has been damaged by deposits, it is better to replace it.

The membrane of the water supply unit often breaks, so the column does not turn on. To determine its condition, remove the top cover of the case. The plate should not be in cracks and gaps, has the correct shape, smooth and even. In case of the slightest deformation, it will have to be replaced. It is better to choose a part made of a durable and elastic material that is resistant to temperature fluctuations and the influence of scale. Install the membrane carefully, crimping the fasteners around the perimeter.

6. Water pressure.

As in the draft situation, the automation blocks the gas supply; if the supply is poor, the burner immediately goes out. It is worth contacting the utilities to find out the reasons, turn off the unit until then. You can use the column only if the water pressure is normal. In private homes, the pressure is increased using a compact station and a regulator. If the column turns on and works normally, and the water is still cold, the device may not have enough power, the parameters are noted in the passport.

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What to do if the column stops heating

If the water is too cold, turn the temperature control on the dispenser all the way to the right. Open the water faucet halfway to slow down the flow through the column - this will help to heat the water more.

The gas pressure at the burner may be too low. Make sure the valve on the gas line is open. If you use liquefied propane gas, invite the master to inspect the gas pressure regulator mounted on a steel cylinder.

Check the faucet for cold water mixing. Grasp the outgoing hose from the column with the other hand at the mixer in the faucet - compare the temperature. If there is a difference in temperature, most likely you should change the mixer.

If the water temperature fluctuates and the geyser turns off. Make sure that all the faucets in the house and the shower head are not clogged with mineral deposits or rust. Also, do not forget to clean the filter elements (mesh) installed in front of the column in a timely manner.

Gas regulation

To prepare the gas path for operation, set the gas supply regulator on the machine body to the minimum mark. By connecting the equipment to the network or inserting batteries into the column, you can open the tap on the gas pipe. Further, after opening the tap with hot water, the device will turn on automatically and start heating the water.

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To continue tuning, take instruments that can measure the temperature of the water. Your goal is to set the gas regulator knob in a position where the temperature of the hot water flowing from the tap will be 25 ° C higher than the temperature of the water entering the column from the water supply.At the same time, remember that gas equipment does not heat water instantly, so you should wait a bit to measure the water temperature.

Further, you can change the temperature of the hot water coming from the tap only with a handle that changes the water pressure. With a decrease in pressure, the water will move inside the column more slowly, and, accordingly, it will heat up more.

In the next video, you can see and hear some interesting facts about the settings and adjustment of gas water heaters.

Major breakdowns

Why does the heating in the column "Beretta", "Junkers", "Electrolux" not work?

Clogged chimney

Over time, soot and soot accumulate on the walls of the chimney, the passage narrows - the draft worsens or completely disappears. The protection system is activated, which does not allow starting gas without thrust. Accumulation of carbon monoxide can lead to poisoning.

To check the presence of traction, bring a lit candle to the hole in the body. If the flame deviates to the side, the thrust is in order. Does it burn evenly? The chimney needs to be cleaned.

Problems with the ignition system

This happens in electronic systems. The batteries that create the spark to ignite are exhausted. Manufacturers recommend replacing batteries once a year, but in reality they need to be replaced more often. The procedure is easy to do on your own. Press activation keys and check ignition, replace batteries.

Weak pressure

If the pressure in the tap is good, the column should work normally. But if the water jet is weak, the membrane creates insufficient pressure to open the gas valve. If the equipment has stopped heating, it is possible that the membrane has already worn out, lost elasticity, and needs to be replaced.

It could also be due to a blockage in the plumbing. What can be done:

• Wait until pressure is restored.
• Contact the utility company and find out the reason.
• Start the reverse flow of water to clear the blockage. To do this, you need to set the third position on the mixer, open both taps. Open the valve and place a container to collect the liquid.
• Clean the mesh filter at the inlet to the water unit.

Water supply interrupted

If you often mix cold and hot water, then the burner burns, but does not heat. She fades quickly. Experts warn that frequent mixing of water leads to a quick breakdown of equipment. Therefore, adjust the position on the thermostat to the mark that will be comfortable for use.

The flame goes out

The burner burns normally, but soon goes out, and the water does not heat up? There were problems with the bimetal sensor, which prevents the column from overheating.

If the installed sensor is too sensitive, then the burner, after working a little, will start to go out. After repeating the start after a time, the burner fires again.

scale

Limescale often settles on the walls of the heat exchanger. This is facilitated by the idle operation of the igniter. When the water from the radiator evaporates, plaque settles on the parts. You can prevent this outcome by installing a cleaning filter. You also need to clean the product from scale.

What else can be done:

• If cool water flows from the faucet, turn the knob on the speaker body.
• Check the gas cock, open it to full capacity.
• Check the operation of the mixer, perhaps its channels are clogged.
• Make sure the holes in the shower head are not clogged with limescale.

Check all the reasons listed and you will be able to fix the problem yourself.If all else fails, contact the service center. Watch the video, which shows the problems with the operation of the column:

2 Reasons why a geyser does not heat water depending on the type

There are a number of common reasons why a gas water heater does not heat water well, including:

1. Heat exchanger dirty. This reason sooner or later applies to all gas water heaters. Most often, a gas column does not heat water precisely because cinders and other formations accumulate on the wall of the heat exchanger, which do not allow heat energy to heat the water sufficiently. For the same reason, the geyser burns, but does not heat the water;
2. Failure of the membrane in the burner. This reason leads to the fact that the power of the flame is not enough to achieve the desired temperature. In such a situation, the Bosch geyser does not heat the water well, and over time the situation will only worsen;
3. Overheating of key mechanisms associated with factory defects. As a rule, this concerns the heat exchanger, or conductors. There are complaints, leaving which, very often, the Neva gas water heater does not heat the water well for this very reason;
4. Reducing the level of gas pressure. This reason has nothing to do with the gas water heater equipment. But the gas system in your house may experience certain failures, due to which the vector gas water heater does not heat water well;
5. Failure of the ignition system battery. Sometimes the Junkers geyser does not heat water well for this very reason.

In addition, the lack of proper prevention, cleaning and maintenance, if signs of a malfunction are found, can cause the Ariston gas water heater to heat water poorly.

Geyser

But it is not always so easy to determine the reason why the geyser does not heat up. In such situations, it is advisable to consult a specialist.

2.1 Wizard's tips on how to make or set up a column so that it heats water

If the Neva Lux geyser does not heat water well, you should heed the advice of the master on troubleshooting and solving problems.

If the Neva gas column does not heat up, and the heat exchanger served as the reason for this, you should start cleaning it. In order to clean the heat exchanger, and thereby improve heat transfer and normalize the water temperature, you should: shut off the water supply to the column, disconnect the device from all communications, remove the front case cover. Next, you can proceed to disassemble the heat exchanger. It is best to clean this element with a stiff brush.

In cases where the Neva 4513 geyser does not heat water well, due to insufficient flame power, the craftsmen advise: inspect the burner and ignition system for blockages or visible damage.

If the matter is clogging, the elements should be cleaned, having previously disconnected them from the system. If you find damage, it is better to contact a specialist, or replace them, if you have sufficient qualifications and experience.

Geyser operation

If you cannot find the answer to the question why the Junkers geyser does not heat up, perform a general inspection of the geyser design and its primary diagnosis. This procedure can help identify contamination or visual problems that are less common than the above.

Also, if the Bosch geyser does not heat up, you should check the mixers for the possibility of clogging.And also apply a purge of the entire hot water supply system, especially after a long stagnation.

In any of the above situations, if you are not confident in your abilities, or the level of your technical skills does not allow you to perform certain operations, you should not repair the geyser. The same applies if your device is still under warranty. Calling the wizard will solve all technical problems.

How does a geyser work?

To understand whether there is any threat from extraneous sounds emitted by the speaker, you need to consider all possible causes. If the column is old, then there will likely be more options. In addition, each model of water heating equipment may have its own characteristics. But still, the principle of their work is similar. Therefore, first you need to figure out how the gas column works and whether it is possible to fix the problem yourself.

Any modern water heater consists of a rectangular box and a supply of gas and water to it. Cold water enters the device and passes through the radiator compartment, where it is heated with a special burner.

As soon as you open a hot tap, a valve opens in the device, which is designed to supply gas to the system. It enters the combustion chamber through a special ignition burner and the process of direct heating of the heat exchange element through which the water passes begins.

Carbon monoxide, which is produced after the combustion of natural gas, is discharged to the street through the chimney. Withdrawal is carried out naturally or forcibly (turbocharged speakers).

To determine and eliminate the cause of a malfunction in a geyser, it is necessary to study its structure and the principle of operation of all elements of the device

In cases where there is no chimney, and its construction is not possible, a turbocharged type of water heater is used. The removal of combustion products is carried out using an additional fan installed in the device. All exhaust gases are forcibly removed to the street through a coaxial pipe. The design of this chimney also provides for the intake of fresh air necessary for combustion from the outside. Such water heater models are made with a closed combustion chamber.

In all geysers, emergency shutdown systems are provided. As soon as the system detects some kind of malfunction, the water heater will stop working.

Automatic protection works under the following conditions:

• weak draft in the ventilation passage or chimney;
• weak fire in the burner, which heats the heat exchanger;
• when the water pressure decreases, the system automatically shuts off;
• with excessive heating of the copper heat exchanger.

Let's take a closer look at the causes of malfunctions in the operation of a gas water heater.

What else can interfere with the heating of water?

If the diagnostics showed that there are no malfunctions in the operation of the gas heater, and the column still does not heat or heats the water poorly, you should heed the recommendations of professionals.

Among them are the following:

1. If the water was always hot, and then its temperature became insufficient, it is worth checking the pressure of the gas coming from the pipeline or cylinder. It is not recommended to do this on your own, it is better to call representatives of the gas service.
2. The water may remain cool if the faucet does not work properly, mixing cold water with hot water. It is easy to check this by touching the pipe through which water flows from the column to the tap. If the pipeline is hot and the water from the tap is slightly warm, it is worth repairing the mixer or correcting its operation.
3. When the temperature of the water supplied from the tap changes dramatically, the gas heater is periodically turned off, it is worth checking the filters in the water heating system, in the mixer.

To increase the temperature of the water at the outlet of the column, it is worth opening the gas supply valve as much as possible, and open the valve responsible for the flow of cold water only halfway. At maximum burner power, the flow of cold water will decrease. This will provide better heating.

The geyser-machine does not turn on: troubleshooting

An automatic gas water heater is an equipment in which ignition occurs automatically when the water is turned on. Such speakers work from built-in batteries (batteries, accumulator).

Contrary to the claims of the manufacturers, the battery life rarely reaches a year: you have to change the batteries more often. You can do this easily with your own hands. In order to make sure that the batteries or the accumulator are discharged, the on and off key should be checked for serviceability. When choosing batteries, it is better to follow the manufacturer's recommendations.

A geyser with automatic ignition may not turn on due to damage to the power cable or piezoelectric element

To replace batteries:

1. Get the container with batteries (often located in the lower right part of the column), pushing the lower lever and prying the receptacle with your fingers;
2. Remove the batteries and replace them with new ones, taking into account the polarity;
3. Insert the container into place (press until a characteristic click is obtained);
4. Return the lever to the same position.

Lack of power to the igniter

In this case, the geyser, powered by batteries or a hydro generator, does not turn on when the water is turned on. A failed water assembly diaphragm (described below) can lead to a malfunction, but more often the cause lies in the following:

• The batteries are dead - the spark works, but its power is not enough to ignite the burner. The column does not turn on immediately, it does not light up for a long time, while the electric ignition constantly works. If the battery-powered column does not turn on, stops responding to the opening of a water tap, the first thing to do is to replace the batteries.
• The hydro generator does not work - this is a turbine that generates electricity from the movement of water supplied to the water heater. The unit is sensitive to water quality and pressure. If the hydro generator refuses to work, it is necessary to clean the internal device from dirt and deposits. The problem is solved in 80% of cases. The pressure required for the operation of the turbine is stabilized using special booster pumps for water supply.
• The power supply is a common cause of a malfunction if the geyser with automatic ignition does not light up. The lack of spark is due to power failures. There are several reasons for the malfunction: the contacts are oxidized, the resistors are swollen. With the ability to solder, you can fix the breakdown yourself. Most often, the power supply is simply replaced with a new one.

Even high-quality batteries, subject to intensive use of the water heater, last only 6-8 months. After that, the column starts to malfunction.

Features of maintenance and repair of speakers

Malfunctions in the operation of water heating equipment are often associated with blockages, difficulties in supplying water and gas. To easily diagnose problems, it is advisable to familiarize yourself with the device of the water heater, the principle of its operation.

Outwardly, the speakers may look different, but the principle of their work remains the same.

All equipment that provides flow-through water heating has similar components and parts:

1. The housing that protects the device can be made of steel, cast iron, various alloys. It houses the control panel, and in advanced models there is also a display for displaying information. If the column does not heat the water well, an error code will appear on the screen.
2. Main burner, igniter.
3. Heat exchanger made in the form of tubes. Water moves through it, here it is heated. Often this node is the cause of a malfunction of the gas heater.
4. The combustion chamber. It can be open or closed. Here, the energy of the fuel is converted into heat.
5. Water node. After opening the tap, the flow of water, passing through this node, activates the membrane. It acts on the stem, which, in turn, opens the valve and passes gas into the burner.
6. Gas valve. He is responsible for supplying gas to the system. If there is a malfunction in its operation, the column may not work correctly.
7. Chimney - an opening for the exit of products of combustion of fuel.

The principle of operation of the gas column is quite simple.When the user opens a hot water faucet, cold water, gas is supplied to the device, and the burner is ignited at the same time.

Cold water passes through the tubes of the heat exchanger, gradually heating up. Combustion products through a chimney or a special opening are redirected to the street.

We talked in more detail about the principle of operation of the column in the article: The principle of operation of a gas column: features of the device and operation of a gas water heater

For operational heating of water, it is important to maintain the operability of all units of the column, to carry out periodic maintenance of gas equipment

The nuances of cleaning the radiator from scale

During the operation of the gas column, scale can form inside the radiator tubes - when hard water is heated, salts and metals are deposited on the inner walls of the heat exchanger. As a result, the gap narrows, and deposits attached to the walls do not allow the heat exchanger to warm up well.

As a result, cold water is supplied perfectly, the gas burner is working normally. However, at the exit, the user receives slightly heated water. This defect can be corrected independently.

To clean the water heater, it is necessary to thoroughly rinse the pipes. Professionals use a special radiator cleaner. For the work of a home master, a solution of vinegar (citric acid) is suitable.

To disassemble and clean the gas column, you must have the following tools and materials:

• a set of keys;
• silicone gaskets;
• a tube with a funnel for filling the cleaning mixture.

Before starting work, it is necessary to close the taps for the supply of cold water, gas. Open a hot water tap to drain fluid from the system. Then you need to remove the fittings, unscrew the case.

After that, you need to remove the tube adjacent to the heat exchanger, drain the remaining water, which may still be about half a liter.

For cleaning, it is necessary to pour a heated solution of citric acid (vinegar) into the heat exchanger, leave for a couple of hours. At the end of the term, connect the coil to the water supply, rinse thoroughly. If desired, repeat the procedure.

Features of elimination of leaks in the column

When water leaks are noticed during use of the gas heater, the cause of the malfunction may be as follows:

• incorrect connection of the device to the water supply;
• failure of seals located at the joints;
• the appearance of a fistula in the heat exchanger tube.

In the first two options, repairs will not be difficult since it is enough to correctly connect the device or replace the gaskets.

Professionals recommend choosing silicone seals that provide tight connections and last a long time. When planning work, it is worth stocking up on gaskets for all connections in order to replace them simultaneously in the entire column and not face a similar problem elsewhere in a short time.

You can try to solder the flowing section of the heat exchanger tube. This will provide a temporary effect, prolong the operation of the gas heater. However, after a fairly short period of time, the fistula may appear elsewhere, so it is advisable that instead of soldering, professionals recommend a complete replacement of the heat exchanger.

The wick does not light up

If the column ignites, but very badly, then there may be several reasons. Let's consider each of them:

• If the piezoelectric element does not work, then in the Astra and Zerten models there may be problems with the igniter.The wick should always burn, and it works when the tap is opened or when the corresponding button is pressed. If the element does not work, the wick does not burn, then the jets of the column could become clogged. To do this, disassemble the device, remove the metal protection or casing and clean the blockage of the jet. It is better to do this with a thin wire. Usually, after cleaning the jet, the column works fine. This is one of the reasons why the Astra gas column and other similar devices do not light up.
• Another case is automatic speakers that light up for a long time. The automatic column ignition system is battery operated. When the faucet is opened, the device is triggered and a powerful spark is formed, which ignites the burner of the column. If there is no spark, then it is worth trying to replace the batteries, but it is better to install batteries.
• The generator of the hydrodynamic system may also fail. The generator rotates when water passes through it. The unit, during rotation, generates a current, from which a spark is then formed. If this is the reason why the geyser does not light up, then it is better to entrust the repair to professionals.