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A gas water heater is one of the most popular hot water appliances. It heats up quickly and is cheaper than electric boilers. However, this technique is also prone to breakage. What to do if the geyser does not heat water? You need to find out the causes and try to fix the problem.
Why is the column not heating?
You need to understand the principle of operation of the device in order to understand this. Behind the metal case are hidden working parts. The water unit consists of a membrane and a gas valve. When water begins to flow into the system and the pressure rises, the valve opens, gas is supplied to the burner.
An important element of the system is the heat exchanger. Water circulates through its tubes, which is heated by a burner. Hot liquid is supplied to the mixer.
Modern models have special sensors and functions that protect the device from damage. According to the type of ignition, devices can be divided into several types:
- Devices with piezo ignition – mechanical ignition of the burner.
- Electric system – ignition with batteries.
- Hydraulic – work with a turbine.
Causes of malfunctions
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.
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 is recommended to check and replace the part every 5-7 years.
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.
Read more in the publication: “How to clean a gas column.”
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.
- If the wiring insulation is damaged, the device is unstable, it does not always ignite. Damaged wires lead to a short circuit on the case, resulting in a fuse. To fix the problem, you need to replace the damaged elements.
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: