The gas control valve allows the pilot to be ignited, and the lit pilot heats the thermocouple. Once the water heater thermocouple is heated, it sends a signal to the gas control valve which allows the burner to operate, heating the water in the tank.
How do I know if my gas control valve is bad?
Here are some signs that indicate your furnace has a bad gas valve.
A Gas Leak. This is a major indicator that something could be wrong with the gas valve in your furnace. A Total Shutdown of the Furnace. A Flooded Furnace. Get Expert Services.
How do I know if my gas water heater is bad?
7 Tell-tale signs of a Water Heater not working
You don’t have enough hot water. You have varying water temperature issues. You have a leaking water heater. You notice reduced water flow. You’re hearing some concerning sounds. You have smelly or discolored water. Your water heater is on the older end of the spectrum.
What causes gas valve failure?
The valve itself may have simply worn out or may be damaged due to basement seepage or submersion. Alternately, one of the electronic gas ignition components or a glitch in the safety circuit may be to blame. If your furnace has a standing pilot light, the thermocouple could be worn out.
How much does it cost to replace a water heater valve?
A new water heater gas valve costs between $100 and $250. It’s wise to purchase the part yourself, as this may be cheaper than buying from a pro.
Do you have to drain a hot water heater to change the gas valve?
Removing a Gas Control Valve
The first thing to do is to turn the gas valve to the “off” position. Depending on the model, it may need to be depressed before turning it. From there, turn the gas valve off for the line leading to the hot water tank. Turn the water line off at the shut off, and drain the water tank.
Are water heater gas valves universal?
Natural and propane water heater gas valves are not interchangeable, so, be sure to order a valve for your type of gas.
How much does it cost to replace a gas valve?
Replacement cost
A gas valve as a replacement part can be pricey – over $200 in some cases. Add to that the labor costs and, as we mentioned above, the cost can range from $300 – $750.
How long do gas valves last?
Gas Valves are routinely checked for 100,000 cycles and are used in equipment that have approximately 15 years life expectancy.
How do you test a gas control valve?
How to Check the Furnace Gas Valve With a Multimeter
Turn off the furnace at the wall control. Take out the bolts in the service panel on the side of the furnace using a nut driver. Pull the wires off the gas valve terminals. Turn the test control on the multimeter to “mV,” which stands for millivolt.
Can a gas valve be repaired?
In some instances you can repair a gas valve on a furnace depending on what is causing it to not work properly. However, repairing your gas valve is not usually the most cost effective option since it can be just as expensive to have your gas valve repaired as it would be to have your entire gas valve replaced.
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