Testing Furnace Gas Valve

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Testing furnace gas valve.

Screw back in the gas valve plug using a small amount of pipe dope. A simple measurement will tell you if your valve is bad or another part keeping voltage from the. Locate the gas valve. Wait for the unit to cool if it has been in use.

Locate the pressure tap on the gas valve and unscrew the plug. Lastly a low voltage can be the problem for its failure to open. Take out the bolts in the service panel on the side of the furnace using a nut driver. Locate the hot surface igniter and look for a spark or glow there.

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. The manometer will give the reading in water column in inches. Set the thermostat or the device s controller slightly above the current room temperature.

Turn on the furnace and start it. This one covers a simple way to find out if the gas valve is being energized on the newer gas furnaces. Some gas valves will have a pressure tap on both sides while some only have one on the furnace manifold side. Locate the front lower access panel to the appliance.

How to check the furnace gas valve with a multimeter step 1. A solenoid valve that is filled with drudge might fail to open. Turn the gas back on. Turn off the gas feed line valve to the dryer.

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. Then screw in your manometer. If this doesn t work read the nameplate mopd rating. There should not be a flame up there if the valve is working correctly.

Disassemble the valve and clean it out with a brush or rag. Pull the wires off. Turn the gas off. Unplug the appliance from the wall outlet.

Great video troubleshooting this goodman furnace gas valve.