To understand in detail how to repair a gas water heater with your own hands, consider the most common breakdowns, their causes and remedies.
All repair work must be performed with the gas valve closed (read how to repair the Oasis gas water heater in this article), even if you do not plan to disassemble the gas part. There is a chance that you accidentally unscrew the wrong nut and gas will start to come out.
Scale on the heat exchanger tubes
The heat exchanger consists of a casing and pipes, into which cold water enters and heats up there. In any case, over time, a small layer of scale appears inside. The main reasons for its occurrence are the high hardness of the water and the operation of the water heater at temperatures above 80 degrees.
It is possible to determine that the pipes of the column are clogged with scale by the fact that cold water from the tap flows actively, and hot water from the column in a thin stream.
The column can be repaired without removing the heat exchanger. The gas is turned off and the water valve is closed. It is necessary to remove the cover from the device and drain the water. To do this, unscrew the union nut from the water inlet to the water heater and turn on the faucet located below everything in the system, usually a faucet in the bathroom. Termaxi geysers have a special tap for draining water from the system. In this case, it is easier to drain the water into the substituted container.
After that, the nuts at the inlet and outlet of the heat exchanger are unscrewed and a special anti-scale liquid is poured into it through a hose, which can be bought at hardware stores. You can also use a vinegar or citric acid solution.
The column is left in this form for several hours. Then everything is connected back and the water valve is turned on. You need to slowly turn on the hot water tap. Dirty liquid should pour out. If after this the head has increased, then the heat exchanger pipes are cleaned. If necessary, you can repeat the entire cleaning procedure several times.
In order to avoid this breakdown, you need to use a water heater at temperatures of the order of 40-50 degrees. You can also install a filter at the inlet, which will purify the water from salts, which form scale.
Gas burner repair with automatic protection system
More complex reasons for the extinction of a gas column with an automatic protection system will be described below.
To carry out the repair of the gas column, it is necessary to clearly understand how the components of the protection system work.
In geysers with an automatic protection system, the gas in the igniter must burn continuously, even regardless of the position of the handle, valve valves and mixers for water supply. The simplest automatic protection system for gas water heaters consists of three elements: a thermocouple, a thermal fuse, and a solenoid valve. The wick of the gas column goes out in cases of activation of the protection elements or in case of a thermocouple malfunction or a clogged igniter.
Related article: How to make curtains beautifully: step by step instructions
If the automation elements fail, evidence of their inoperability is the process when the igniter of the gas column goes out after they stopped holding the gas control knob. To carry out repair work, it is necessary to clearly understand how the nodes of the protection system work.
Clogged radiator
The heat exchanger radiator consists of pipes and metal plates closely spaced to each other.The plates are in direct contact with the flame, so over time, soot collects on them.
You can determine that the problem is in this by the following indicators:
- Flame yellow.
- The fire does not tend upward, but to the side, heating the case.
- When operating at full capacity, the water heats up slightly.
- Soot pours out from under the column.
In order to clean it, you need to remove the heat exchanger. For this, the casing is removed, and all the elements that hold it are unscrewed. During parsing, cover the burner with a rag so that no soot gets into it.
After removal, the unit rushes to the bathroom and washes there. It is best to leave it in a container with high sides for a few hours to allow the soot to deteriorate. Further, the space between the fins of the heat exchanger is cleaned under running water using a long-bristled brush and detergents. At the end, dry and install in the reverse order.
Leaking pipes
If water begins to drip from the column, the reason may be that fistulas have formed on the copper pipes. In order to find the place of leakage, you need to carefully inspect the heat exchanger with the water turned off. Some fistulas are easy to find, you will see how water comes out of these places. Small holes can be seen by green spots and rust all around.
There are three ways to eliminate the leak:
- Fit a clamp with a rubber gasket. If space permits, and the pipe does not fit snugly against the casing, the simplest, fastest and most effective is to install a metal clamp with a rubber gasket. Despite its simplicity, this method allows you to eliminate the leak without damaging the structure.
- Solder the fistula. Having previously cleaned and degreased, the place of leakage is covered with a flux. After that, using a powerful soldering iron or a torch with a gas cylinder, the fistula is soldered. In this case, it is necessary to ensure that the solder covers the desired section of the pipe with a layer of 1-2 mm.
If multiple holes are side by side, it will be effective to solder a piece of copper plate. It is not recommended to solder cheap Chinese heat exchangers. They are usually painted on top to hide the uneven color of the impure copper. In such columns, the pipes are too thin and will burn out during brazing. - Use cold welding. In this case, it is important to carefully look at the instructions and make sure that they can withstand high temperatures. A piece of cold welding is taken out of the package and kneaded with gloved hands until it hardens. After that, it is applied to the pipe and smoothed until it hardens completely.
After the end of the soldering, water is run into the water heater to check it. It is advisable to additionally clean and solder all areas of a greenish tint. Perhaps, after a while, new fistulas will appear there.
Also, leakage can form due to the fact that the gaskets are worn out. If water flows out of the pipe joints, you should simply replace the gaskets there with new ones.
The solenoid valve of the gas column does not work.
Installation, installation, operation of all types of gas boilers.
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Posts: 9 • Page 1 of 1
The solenoid valve of the gas column does not work.
the guest »06 Mar 2013, 10:20
What happened, the gas water heater stopped turning on, the gas simply does not ignite. There is water flowing, there is pressure in the system, the gas is open - it does not ignite, and that's it. The column is completely automatic, to do it as the master explained - nothing is needed, it works itself, lights up and turns off. After the wife washed, the column stopped turning on.
the guest
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The solenoid valve of the gas column does not work.
Sergey N »06 Mar 2013, 10:22
In 90% of cases, it turns out to be dead batteries. If your speaker is fully automatic, then it must have batteries. The manufacturer usually installs Duracell. Since they are more powerful than conventional ones and with them, the column ignites without problems.If the user replaces them with cheap ones, hoping to win some money, these batteries do not draw out the required power and the column does not light up. Especially when it comes to salt batteries.
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Sergey N
Messages: 2684 Registered: 11 Mar 2012, 23:18 Where from: Kazan
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The solenoid valve of the gas column does not work.
Bibikin Ivan »06 Mar 2013, 10:25
Yes, it's definitely a matter of batteries, if all other parameters have not changed. Buy quality durassels or barrel energizers 2pcs and everything will work as it should. If you feel sorry for the money, you can do this - check the breakdown, connect the power supply from the power supply or a 3V battery and try to start the column. If you start - feel free to change the batteries, it's definitely in them!
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Bibikin Ivan
Messages: 1662 Registered: May 16, 2012, 14:10 Where from: Moscow
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The solenoid valve of the gas column does not work.
Igor_01 »06 Mar 2013, 10:30
And the flow of water has not decreased from time to time, have you noticed anything? Another problem happens when the heat exchanger becomes clogged with scale. The water pressure weakens and the low flow protection is triggered - the gas simply does not open. This is also quite common, especially in domestic speaker models. Often there is simply no coating from the inside. It is treated by disassembling and flushing the system with acid.
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Igor_01
Messages: 2010 Registered: Apr 13, 2012 12:23 pm
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The solenoid valve of the gas column does not work.
Rikota »07 May 2013, 14:07
The guest wrote: the gas water heater stopped turning on, the gas simply does not ignite. There is water flowing, there is pressure in the system, the gas is open - it does not ignite, and that's it. The column is completely automatic, to do it as the master explained - nothing is needed, it works itself, lights up and turns off. After the wife washed, the column stopped turning on.
I think that "the wife washed herself" has nothing to do with it, there is no causal relationship between the wife's bathing and the failure of the column. I also disagree that "90% is the reason for dead batteries." The reason “Gas is open - does not light up” may be the flow sensor, the automation simply “does not see” that there is water flow through the column. Or maybe the problem is in the gas valve. You can guess for a long time. In any case, start by replacing the batteries (if you have fired up from them), it won't help - call a specially trained person. Of course, you will have to pay for diagnostics. But he will establish the exact cause of the problems. Rikota Messages: 994 Registered: 11 Mar 2013, 12:41
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The solenoid valve of the gas column does not work.
Anatoly64 »03 Jan 2014, 20:14
It helped twice, replacing the electromagnet with a new one, but why this happens I cannot say.
Anatoly64
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The solenoid valve of the gas column does not work.
Drugomysh »17 Apr 2020, 14:54
There is a solution when the solenoid valve does not open. Apparently there is a weak current on the coil, and even the gas pressure "holds" the valve closed, so the valve needs help (if the stem moves freely on the removed valve, it should work). A not very strong magnet should be applied to the back wall of the valve, so that it does not open the valve by itself (in my case, it was a magnet from the curtains). The valve stem will be in a magnetized state, and a minimum of effort will be needed to move it, even with dead batteries it works. You can experiment with the power of the magnet.
Drugomysh
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The solenoid valve of the gas column does not work.
Igor »18 Nov 2020, 12:08
Thanks for the tip about installing the magnet to the valve WORKED !!
Igor
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The solenoid valve of the gas column does not work.
roodme »09 Feb 2020, 16:17
But it didn't help me, I tried it, but it turned out to be more complicated. I didn’t begin to engage in any more amateur performances, otherwise I’ll get things done, so I called for service of gas boilers. even they had to break their heads, but I can imagine how much I would have suffered myself without outside help. well, it's good that we figured out and fixed everything, now I live in peace roodme
Messages: 32 Registered: Oct 16, 2013 10:12 am
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