Testing Furnace Gas Valve

Pull the wires off.

Testing furnace gas valve.

Disassemble the valve and clean it out with a brush or rag. The manometer will give the reading in water column in inches. The ratings listed must align with the pressure rating shown on the valve. Turn off the furnace at the wall control.

Turn on the furnace and start it. Locate the pressure tap on the gas valve and unscrew the plug. Videos you watch may be added to the tv s watch history and influence tv recommendations. Turn the gas back on.

This video is part of the heating and cooling series. A simple measurement will tell you if your valve is bad or another part keeping voltage from the. Locate the front lower access panel to the appliance. Screw back in the gas valve plug using a small amount of pipe dope.

Locate the hot surface igniter and look for a spark or glow there. Locate the gas valve. Turn the gas off. 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. If playback doesn t begin shortly try restarting your device. Set the thermostat or the device s controller slightly above the current room temperature. Turn off the gas supply valve to your appliance to test whether your valve is capable of shutting down properly.

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. Unplug the appliance from the wall outlet. A solenoid valve that is filled with drudge might fail to open.

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. There should not be a flame up there if the valve is working correctly. Take out the bolts in the service panel on the side of the furnace using a nut driver.

If this doesn t work read the nameplate mopd rating.