Testing Furnace Gas Valve

Some gas valves will have a pressure tap on both sides while some only have one on the furnace manifold side.

Testing furnace gas valve.

This one covers a simple way to find out if the gas valve is being energized on the newer gas furnaces. There should not be a flame up there if the valve is working correctly. Locate the hot surface igniter and look for a spark or glow there. Locate the 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. Take out the bolts in the service panel on the side of the furnace using a nut driver. The ratings listed must align with the pressure rating shown on the valve. Locate the pressure tap on the gas valve and unscrew the plug.

Locate the front lower access panel to the appliance. Then screw in your manometer. Set the thermostat or the device s controller slightly above the current room temperature. Wait for the unit to cool if it has been in use.

Videos you watch may be added to the tv s watch history and influence tv recommendations. Pull the wires off. A simple measurement will tell you if your valve is bad or another part keeping voltage from the. Turn off the furnace at the wall control.

Turn the gas off. Screw back in the gas valve plug using a small amount of pipe dope. Unplug the appliance from the wall outlet. If playback doesn t begin shortly try restarting your device.

Great video troubleshooting this goodman furnace gas valve. Lastly a low voltage can be the problem for its failure to open. The manometer will give the reading in water column in inches. Turn on the furnace and start it.

How to check the furnace gas valve with a multimeter step 1. A solenoid valve that is filled with drudge might fail to open. Disassemble the valve and clean it out with a brush or rag. If this doesn t work read the nameplate mopd rating.

Turn off the gas supply valve to your appliance to test whether your valve is capable of shutting down properly.