Testing Furnace Gas Valve

A simple measurement will tell you if your valve is bad or another part keeping voltage from the.

Testing furnace gas valve.

Pull the wires off. 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. Wait for the unit to cool if it has been in use. Turn the gas off.

If this doesn t work read the nameplate mopd rating. Turn on the furnace and start it. Turn off the furnace at the wall control. 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. The ratings listed must align with the pressure rating shown on the valve. Turn the gas back on.

Then screw in your manometer. This video is part of the heating and cooling series. Videos you watch may be added to the tv s watch history and influence tv recommendations. Screw back in the gas valve plug using a small amount of pipe dope.

The manometer will give the reading in water column in inches. Locate the gas valve. Locate the pressure tap on the gas valve and unscrew the plug. 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. This one covers a simple way to find out if the gas valve is being energized on the newer gas furnaces. Turn off the gas feed line valve to the dryer. Unplug the appliance from the wall outlet.

Great video troubleshooting this goodman furnace gas valve. If playback doesn t begin shortly try restarting your device. Some gas valves will have a pressure tap on both sides while some only have one on the furnace manifold side. Disassemble the valve and clean it out with a brush or rag.

How to check the furnace gas valve with a multimeter step 1.