Can A Gas Valve Be Repaired? (Answered)

Are you looking for Can A Gas Valve Be Repaired? You should know that only a limited range of boiler and furnace models are compatible with gas valves. Consequently, you can discover two units of valves that together make up the gas valve whenever a unit interacts with a gas valve. The burner trays receive gas from the secondary valve, also known as the main valve, while the pilot light uses the primary light as its gas source.

The power source that activates the primary valve is the thermopile. The portion of the valve is engulfed in the pilot light’s flame. The thermopile must be heated precisely for the gas valve to remain open. The pilot light loses gas supply if the furnace valve closes. This protects dwellings from gas buildup.

The valves are all carefully positioned and in the proper sequence. The circuit is automatically cut off whenever the unit detects an obstacle in the system’s operation. The thermopile describes how the furnace gas valve operates. This explains why the temperature in the space and the house is constant.

Can A Gas Valve Be Repaired? Permanent Solution

The gas valve should be changed if its internal parts are damaged. It is impossible to fix the gas valve on the spot. These repairs can only be done by the gas valve maker or a person who has received certification from the manufacturer.

Gas Valve Be Repaired

Repairing The Gas Valve Issues

As seen from the list above, numerous other furnace components may also be affected by a malfunction with the gas valve. Finding the source of the problem requires competence and the correct testing equipment. A technician employs a variety of subtle indications, including noises, scents, and the physical characteristics of each component, to troubleshoot.

It is advisable to avoid attempting to fix gas valve issues yourself for most homes. Only touch or attempt to repair the gas valve if you are knowledgeable about gas valve repairs for furnaces and have experience in the field. This can complicate the diagnostic process and lead to more damage. The ideal person to fix a gas valve or furnace is a reliable repairman.

Repairing The Gas Valve Issues

Make a note of anything you notice or hear that would indicate a specific problem, such as damaged wiring. Make a note of any strange behavior your furnace exhibits, such as briefly turning on and then turning off again. Giving the specialist as much information as possible about your furnace could speed up the repair process and lower costs.

 Before determining the cause of the issue or attempting to solve it, your repairman should be prepared to hear from you and your experience with your furnace. Look for a different heating and conditioning firm if your furnace repair professional needs to respectfully listen to or treat you with respect. The technician you pick should provide you with outstanding customer service.

Different Gas Valves

Combination and chain gas valves are the two types of gas valves now used in furnaces. Although their component arrangements differ significantly, each carries out the same basic tasks.

Combination Valve

For nearly 75 years, combination valves have been a preferred choice for house furnaces. They gain their name from the combination of mechanical and electrical parts of a single unit. A combination gas valve consists of the following parts:

  • An emergency manual shut-off valve that enables you to cut off the gas supply physically
  • a regulator for managing gas pressure
  • a solenoid valve that regulates heat under thermostat control
  • an anti-flame pilot safeguard that cuts off the gas supply

Gas Chain Valve

The same three switches the solenoid valve, the thermocouple, and the pilot safety valve are part of a somewhat different form of valve called a gas chain valve. They are separate and connected in a series (or “chain”). This is the primary distinction.

Together, the parts of a gas valve prevent gas leaks, furnace damage, and even explosion. Safety must always come first while performing furnace repairs.

How To Test A Furnace Gas Valve?

A furnace gas valve can have many different things tested. Checking the solenoid coil on the gas valve is the first and simplest step. Switch on your multimeter. Choose the resistance/ohms mode (often represented by).

Put your multimeter’s probes in contact with the terminals on the gas valve. The gas valve is damaged if the reading is OL. Hitting a gas valve with a hammer is another method of testing it. No hammer blow to your gas valve will cause it to become unstick and open.

The key is to strike it as soon as your furnace’s control board transfers voltage in that direction. So wait 3 to 4 seconds after the ignitor lights up before pressing the gas pedal. You don’t need to strike the gas valve firmly. It only requires a few light taps with a hammer or wrench.

If your gas valve opens up after hitting it, you will have heating. The valve is still defective, though. It will require another tap of the hammer to get the valve to open up once it has shut down again. The valve has to be replaced because it is broken.

Replacing The Gas Valve On A Furnace

A furnace gas valve replacement is a difficult task. Since it involves your community’s gas supply, it’s often illegal to do it yourself. I advise hiring an HVAC contractor to replace your furnace gas valve if it needs to be done.


The answer to Can A Gas Valve Be Repaired? Is Yes!! A broken gas valve is one of the most common problems with gas furnaces. Although it may be tempting, trying to test or replace this component yourself is not a good idea.

Self-testing or self-replacing a gas valve could be dangerous for you, your house, and your family. Additionally, doing so can worsen the situation by endangering your furnace further. 

Aside from potential safety risks, performing this repair yourself will likely result in financial savings. You would need to purchase the appropriate tools to test and replace your gas valve and the time needed to complete the task safely and correctly.

By performing this process yourself, you might even be breaching the law or nullifying the guarantee on your furnace. Some other strong arguments exist against testing and replacing a malfunctioning furnace gas valve.

Frequently Asked Questions

How long is a gas valve expected to last?

Gas valves are employed in equipment with a life expectancy of roughly 15 years, and they are frequently examined for 100,000 cycles.

Why should a gas valve be replaced?

An incorrectly operating gas valve won’t provide enough fuel to the furnace’s burners. While gas valves stuck in the open position continuously discharge fuel into furnace burners even after the furnace is turned off, valves trapped in the closed position deprive the furnace’s burners of fuel.

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