Testing Furnace Gas Valve

Great video troubleshooting this goodman furnace gas valve.

Testing furnace gas valve.

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. Locate the pressure tap on the gas valve and unscrew the plug. Turn on the furnace and start it. Turn off the furnace at the wall control.

Then screw in your manometer. If playback doesn t begin shortly try restarting your device. Turn off the gas feed line valve to the dryer. This video is part of the heating and cooling series.

Locate the front lower access panel to the appliance. The manometer will give the reading in water column in inches. Disassemble the valve and clean it out with a brush or rag. Screw back in the gas valve plug using a small amount of pipe dope.

If this doesn t work read the nameplate mopd rating. This one covers a simple way to find out if the gas valve is being energized on the newer gas furnaces. Take out the bolts in the service panel on the side of the furnace using a nut driver. There should not be a flame up there if the valve is working correctly.

Set the thermostat or the device s controller slightly above the current room temperature. A solenoid valve that is filled with drudge might fail to open. Locate the hot surface igniter and look for a spark or glow there. Turn the gas off.

Turn the gas back on. Unplug the appliance from the wall outlet. Wait for the unit to cool if it has been in use. How to check the furnace gas valve with a multimeter step 1.

Locate the gas valve. Turn off the gas supply valve to your appliance to test whether your valve is capable of shutting down properly. A simple measurement will tell you if your valve is bad or another part keeping voltage from the. The ratings listed must align with the pressure rating shown on the valve.

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