Boiler boils when hot water is turned on

Bulkagest boiler heating. why water boils in the boiler or heating system? Why is water gurgling in the boiler

There are several reasons why water boils in the heating boiler. For example, boiling is often the result of the fact that the liquid is heated in the boiler faster than the heat energy is transferred to the heating main. This happens due to:

  • incorrect installation of the system;
  • the fact that there is no circulation (or its speed is low). usually occurs in open-type systems with an expansion tank;
  • too much power of the device compared to batteries;
  • low amount of water in the line.

Use of the safety valve

This is not the same as a safety valve. The latter simply resets the pressure in the system, but does not cool it. Another thing. a valve of protection against the overheating of the boiler, which takes off the hot water from the system, and instead it serves cold, from the water pipeline. The device is non-volatile, connected to the supply and return lines, water supply and sewerage.

At a coolant temperature above 105 ºС, the valve opens and, due to the pressure in the water supply system of 2–5 bar, hot water is forced out of the heat generator jacket and cold pipelines, after which it goes into the sewer. How the solid fuel boiler protection valve is connected is shown in the diagram:

The disadvantage of this method of protection is that it is not suitable for systems filled with non-freezing liquid. In addition, the scheme is not applicable in conditions where there is no centralized water supply, because along with a power outage, the water supply from a well or pool will also stop.

The gas boiler boils. the causes of overheating and what to do

Even if you approach the issue of choosing a gas boiler with all responsibility, various problems may occur during its operation. For example, the boiler starts to boil, and the security system stops its operation. In the article, the master plumber will analyze the possible causes of overheating of the boiler, how to detect and fix the problem.

During normal operation of the equipment, the coolant in the circuit warms up to a predetermined temperature. After that, naturally or forcibly due to the pump, it is carried through the heating system. This is how the radiators in the room warm up. Then the liquid moves along the return circuit and returns to the boiler.

The movement of the coolant (water) must be calculated in such a way that it has time to cool down completely on the way through all the radiators and return to the boiler already cooled. If this does not happen, then the superheated water at the entrance to the boiler has time to boil while moving along it.

There are a number of factors that lead to overheating of water in the boiler. Each of them is based on either an incorrect calculation of the heating system, or the failure of its individual elements. A more accurate determination of the sources of failure of the stable operation of the heating system requires a detailed analysis of a specific scheme.

In the event of malfunctions, the coolant overheats, thermal sensors are triggered, and the security system stops the heating boiler. Well, if the device is equipped with a display, then the self-diagnosis system will display the error number on the screen, depending on the boiler model:

  • 01 for Ariston;
  • E02 for Baxi;
  • E9 for Bosch;
  • 4C for Buderus;
  • E02 for De-Detrich;
  • E2 for Electrolux;
  • E01 for Navien;
  • F.20 for Protherm;
  • F.20 for Vaillant;
  • F02 for Viessmann.

If the equipment is not equipped with a display, then overheating is determined by external signs: the device heats up more than usual, and the burner immediately stops working.

There are several possible causes of boiler overheating:

  • Clogged filters;
  • The formation of air congestion;
  • Clogging of the heat exchanger (for example, scale);
  • Circulation pump malfunction;
  • Incorrect operation of the smoke removal system;
  • High power technology.

Is Your Hot Water System Making A Strange Rumbling/Popping Noise?

Low circulation of the coolant in the heating circuit leads to the fact that the water stagnates and boils. When doing this, you can hear a gurgle inside the boiler.

If the technique overheats, do not tighten with repair. There are times when a gas boiler explodes, so fix the problem as soon as you notice it.

In case of any problems, it is best to call a service engineer who can better understand the problem and suggest a solution. Otherwise, you can only aggravate the problem that has arisen in the system.

Check your filters first. Turn off the boiler and wait until the water cools down. Turn off all taps and remove filter. If it is clogged, rinse in a solution of citric acid, you can clean it with a soft brush. If the filter is completely worn out, it is better to replace it.

Boiling water can also occur when the heating system is aired. Air can not only slow down the movement of the coolant, but also completely stop it.

Touch the radiators with your hand. If they warm up unevenly, most likely an air lock has formed. For this, specialists use special equipment that detects cold spots in the heating circuit.

So, in case of air jams, follow the following algorithm of actions:

  • Put under the crane of the Maevsky basin or a saucepan, and then open it;
  • You will hear air hissing out of the circuit. Then water can flow. Don’t turn off the faucets right away. Wait until the fluid succeeds and is injured by all air;
  • Repeat the procedure until the aircraft is completely eliminated.

Even with the use of high-quality coolant with a constant operation on pipes and walls of the heat exchanger, various salts are formed. Due to scale, the passages narrow, the pressure decreases, and the water boils.

Magnesium and potassium salts are deposited on boiler parts when heated above 55 degrees. Most of all, scale settles in the heat exchanger, because the liquid circulates and heats up in it. As a result, the passages in the tubes narrow, the pressure decreases, and water boils in the node. This leads to overheating and damage to the heat exchanger.

To clean the assembly, dismantle it. The most effective way is to connect a pump to the unit and pump the reagent. After that, the radiator is washed with flowing water, dried and installed in place.

At home, the radiator is placed in a metal container with warm water. The citric acid solution is poured into the coil. The container is placed on the stove, where it warms up for half an hour.

To prevent the formation of scale, install magnetic filters. It is enough to change their cassettes once a month, but they soften the water well.

If you are using a closed heating system, then check the operation of the pump. With prolonged non-use, its parts could stick or clog. usually the problem is solved by washing it.

Improper operation of the smoke exhaust system

Heating of the boiler body can occur when the smoke exhaust system is malfunctioning, and the heat exchange surface on the burner side can be dirty or clogged with soot.

Check the presence of draft in the chimney, the flow of combustion air into the room. Clean out the chimney.

The problem can also occur if the power of the device is incorrectly selected. For example, at high power and low water flow. The coolant simply will not have time to cool.

It is best to eliminate this problem at the stage of installation and purchase of equipment. Consult with specialists, they will calculate the needs and suggest the necessary equipment parameters.

If the heating system is already installed, contact the specialists for help to adjust and configure the device. May need to reduce gas pressure.

In order for your gas equipment to work smoothly and safely, follow these rules:

  • Perform a quality installation. It is from the competent actions of specialists during installation that the further operation of the equipment depends.
  • Use only high quality fuel. In the case of main gas, you cannot influence this, but if liquefied gas is used, then purchase only a high-quality mixture.
  • Perform Annual Service. Gas service specialists will clean the heat exchanger and the boiler body, check the sealing of the connections and adjust the boiler automation for maximum efficiency with low fuel consumption.
  • Be sure to ensure that when the boiler is turned off, no moisture remains in the system. otherwise this will lead to corrosion and problems with the equipment.

Only by observing all these rules in a complex can you significantly extend the life of a gas boiler.

High boiler power

If the power of the device is higher than the heat transfer of the main, this can also lead to boiling water. Especially if the air supply adjustment system is broken or absent altogether. There are several options for solving the problem:

  • install an automatic adjustment system;
  • put a similar, but semi-automatic;
  • change the boiler (if it is made by hand);
  • increase the number of batteries;
  • increase their power.

note! In addition, you can embed an indirect heating boiler into the line. this device will absorb some of the energy from the water heating system and at the same time serve as a kind of heat accumulator.

Methods for eliminating the causes of shutdown of units

Incorrect unit power

If the gas boiler often turns on and off, then this indicates that the power of the unit is too high for this room. As a result, the device quickly gains the desired temperature and turns off. Frequent on-off leads to increased wear of boiler parts. Therefore, before buying a gas device, it is important to calculate the optimal indicator of its power based on the area of ​​\u200b\u200bthe heated room, its insulation and other factors.

For a large private house, floor-standing gas boilers with a capacity of 35 kW or more are suitable. For apartments and small cottages, it is better to purchase compact hinged models that fit perfectly into a small kitchen or hallway.

If the boiler is already installed, then the problem of the passage of power can be solved by the following methods:

  • installation of four-way valves;
  • reconfiguring the gas burner to the minimum mode;
  • Connecting a boiler or other systems so that part of the power of the boiler was spent on them.

Low pressure in the highway

Typically, the causes of low gas pressure are such factors:

  • Fuel Meter Problems. Unusual sounds or noise may come from the device. On a faulty device, the readings change jerkily or the arrow does not move at all. Contact a specialist to eliminate the problem.
  • Protective sensors worked. if the system has noticed the fuel leakage, the unit operation is blocked. The leak also smells like gas. If such a problem occurs, turn off the gas boiler and call the gas service master.
  • The filter is clogged. it should be cleaned.

Reverse thrust

If a back draft occurs and the flame goes out, the gas boiler protection system is activated and it turns off.

The situation can only be corrected by eliminating reverse thrust. To do this, it is necessary to identify the cause of its occurrence. For example, adjust the design of the chimney, install a deflector, etc.d.

Reverse thrust also occurs with poor ventilation indoors. It is easy to check this. the flame will burn well when the window is opened. The following factors worsen ventilation:

In this case, measures should be taken to improve ventilation.

Chimney problems

A common problem for gas boilers of open and closed type is frost that forms at the outlet of the chimney. Hot burning products come out of the pipe and converted into condensate, which freezes on the ledge. This afraid prevents the air intake, the fire goes out and the boiler turns off. It is necessary to clean the ice and the air flow will resume.

If frost forms regularly, then you need to insulate the chimney.

A classic chimney is more prone to all sorts of blockages. It can get there:

boiler, boils, water, turned

Voltage drops online

If the voltage in the mains drops below the indication provided by the operating mode of the unit, the security system will turn off the gas boiler. When the voltage returns to normal, the unit will start again.

To avoid this problem, you should install an uninterruptible power supply.

Learn here why smoke Gas boiler

Fan malfunctions

In turbocharged gas boilers, air is supplied and combustion products are removed using a fan. If a failure occurs in this node, the boiler will turn off.

In this case, it is necessary to diagnose the fan, clean it from clogging, replace damaged parts, inspect the wiring.

Pump problems

If the pump fails, the coolant circulates poorly through the system. As a result, radiators are not heated, and the automation turns off the gas boiler.

If the circulation pump has been included in the system recently, and after that the unit has become disconnected, then might have been made errors when installing it.

How to fix your heating or hot water when it overheats and the boiler will not turn off.

Burner malfunctions

If the gas boiler is turned off all the time, then the burner function should be checked:

  • If ignition does not occur and the flame immediately goes out, then most likely the problem is in the nozzles. they should be cleaned of soot and excess air should be released. It is also advisable to check the position of the ignition electrode and, if necessary, clean it.
  • If the flame goes out after a short burning, then the ionization electrode should be diagnosed.
  • There is a separation of flame and nozzle noise. it is necessary to adjust the supply of gas. Sometimes this is due to excessive traction.

we just installed a new boiler, it quickly picks up temperature and when it heats up it feels like the kettle starts to boil and goes out and at the same time the batteries are cold

Why does the speaker crackle and click?

Clicking and crackling, another common malfunction of gas flow-through water heating equipment. Breakdown occurs in both automatic and semi-automatic boilers. The following is the nature of the sounds and indicates what exactly can cause them:

  • The geyser clicks, but does not ignite. the contacts on the ignition unit are oxidized. The module is not disassembled and needs to be replaced. The catalyst for the fact that the geyser cracks, but does not ignite, can be dead batteries.
  • The geyser clicks after the water is turned off. the frog water regulator is out of order. Inside the block there is a rod with paws connected to the ignition block. After turning off the water, the spring should return the metal rod to its original position.If the stem is rusted, it may seize. Ignition unit stays on and continues to spark. For this reason, the column is cracking after inclusion. A malfunction can cause a filling frog membrane. it is required to replace it.
  • Piezoelement constantly cracks. contacts oxidized, which leads to hot and sustainable response.

The noise in the column causes insufficient draft (the flame burns with a buzz, changes its color, there is soot), poor air circulation (observed after installing metal-plastic windows in the kitchen), clogging of the burner ignition wick or overgrowing of the heat exchanger with scale. The malfunction is found by elimination during the next column maintenance.

Why is the gas boiler buzzing and / or whistling?

There are times when the boiler interferes with its emitted noise. The burner makes a jet-like noise when operating. The gas boiler is noisy and can be heard throughout the house. It naturally interferes with sleep, especially turning on after a pause. How to reduce the noise published by a gas boiler?

Usually, no boiler noise and the fan that is not installed in it, and not the correct chimney installation. So that the boiler begins to make a noisy sound, just narrow the chimney, and you are provided with sound like at the airport. Solution. change or expand the chimney.

There are very frequent cases when gas equipment with surplus burners begins to buzz. The fact is that fan aggregates are equipped with a stabilization system aimed at regulating the gas pressure supplied to the combustion chamber. When working such a boiler is buzzing like a vacuum cleaner. To minimize the unpleasant buzz, it is better to build a boiler room building away from a residential building, and make good sound insulation for it.

The boiler may begin to hum due to a thick layer of plaque on the inside of the heat exchanger tube. The boiler begins to boil. it makes a sound like the sound of water from a boiling kettle. Clogged primary heat exchanger. You can check this as follows: set the maximum temperature on the boiler and close the return or supply valve so that there is a minimum water flow. When the temperature reaches about 80 degrees, the hum increases. The only way to solve the problem is to clean the heat exchanger.

Shock-absorbing lining is a rubber sheet with a thickness of 10-12 mm or rubber washers of the same thickness. To reduce noise, all connections must be tight, rigid, the chimney must be additionally insulated with thermal insulation (basalt min. cotton wool, etc.)

It happens that when the ignition button is pressed, a whistle is heard from the pilot burner nozzle. If air has appeared in the gas pipeline or gas fitting, it is necessary to unscrew the nut at the junction of the gas pipe to the gas fitting, press the ignition button, after loosening the tube, bleed the air that has appeared until the smell of gas appears. Tighten the nut.

If there is a flame separation, then the gas pressure of the ignition burner should be adjusted with the adjusting screw. There are times when the wrong nozzle is installed, then it just needs to be replaced. This situation takes place in domestic units. The nozzle may also have a factory defect, expressed in the absence of a chamfer along the edges of the holes. When switching to an increased intensity mode, the gas flow breaks out and the boiler starts to whistle. The only way out in this case is to replace the injector.

We should not forget that gas boilers are explosive, therefore, to correct problems, it is better to contact the specialists of Tyumengazservis LLC by phone 8 3452 58-04-04.

Overheating of a gas boiler: 6 main reasons

When operating a gas boiler, you can often encounter the problem of its excessive heating. Why a gas boiler is hot, we will understand in this article. If you find that the body of the device has become warm or hot, then a malfunction has occurred. It needs to be fixed as soon as possible. First, it should immediately check the functionality of the burner. Its settings are probably messed up. As a result, a powerful flame appears, from which the heat exchanger overheats, as well as the upper part of the boiler. In this case, it is required to reduce the power of the flame.

In addition to this reason, heating can appear when the gas boiler settings can be reset. The aggregates are made according to the power of the burner. Exceeding the recommended power leads to disorders in the operation of the boiler. In this case, it should be immediately resorted to the help of a specialist.

Attention! Do-it-yourself modifications of boilers are illegal and may result in fires or explosions.

The most common source of the problem is an air lock in one of the nodes. It is necessary to carefully examine the entire system, focusing on the circulation of hot water. If a warm liquid comes from a pipeline instead of a hot one, it means that this is where an accumulation of air has formed. It is necessary to bleed excess air from the system using bleed valves. If this problem has not been detected during the test, most likely, the cause of boiling lies directly in the boiler functionality.

Zojirushi Water Boiler: Continuous or Excessive Boiling Fix

Overheating of the boiler laid into the basis of the gravitational heating system may be caused by the insufficient intensity of the circulation of the coolant in the circuit. In this situation, an expansion tank should be placed at a point in the house that will be the highest, in which case an additional load will be placed on the boiler and the required heated resource will be sent to it.

The most practical method of solving the problem, experts recognize the installation of the circulation pump and equipping the heating system by the submeece circuit. Both types of devices allow you to reduce the load on the functionality of the heater, cooled water will be added to the network. The boiler will receive a return flow, it will provide its natural cooling.

Overpressure in the heating pump

The pump provides high pressure, it is necessary to debug its settings. Excessively high pressure in the system can cause an emergency.

Low water in the system can cause the device to overheat. Try lowering the thermostat. It may be necessary to add water to the device to the required mark.

  • If the boiler seems to “howl”, the gas valve may not be set correctly, check the jumpers.
  • At high power, the source of extraneous sounds may be a gas meter.
  • The valve was worn out and began to rattle. It needs to be replaced.If the problem persists and the boiler is still noisy, you can replace the valves with ball valves and install a rubber gasket.
  • If the above measures do not help, you may need to replace the cooler.
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