Testing Furnace Gas Valve

Turn off the gas feed line valve to the dryer.

Testing furnace gas valve. Turn the gas back on. Unplug the appliance from the wall outlet. Pull the wires off. Turn off the furnace at the wall control.

Turn off the gas supply valve to your appliance to test whether your valve is capable of shutting down properly. Great video troubleshooting this goodman furnace gas valve. If playback doesn t begin shortly try restarting your device. Take out the bolts in the service panel on the side of the furnace using a nut driver.

Locate the pressure tap on the gas valve and unscrew the plug. Turn on the furnace and start it. Locate the hot surface igniter and look for a spark or glow there. Set the thermostat or the device s controller slightly above the current room temperature.

Lastly a low voltage can be the problem for its failure to open. Wait for the unit to cool if it has been in use. Screw back in the gas valve plug using a small amount of pipe dope. Locate the gas valve.

Disassemble the valve and clean it out with a brush or rag. If this doesn t work read the nameplate mopd rating. This valve is usually found in the wall line leading to the dryer and is shut off by turning the handle perpendicular to the gas line. Some gas valves will have a pressure tap on both sides while some only have one on the furnace manifold side.

A solenoid valve that is filled with drudge might fail to open. There should not be a flame up there if the valve is working correctly. Locate the front lower access panel to the appliance. Then screw in your manometer.

A simple measurement will tell you if your valve is bad or another part keeping voltage from the. This video is part of the heating and cooling series. The manometer will give the reading in water column in inches. Turn the gas off.

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