Furnace Gas Valve Pressure Test

Turn the gas back on.

Furnace gas valve pressure test.

Take out the bolts in the service panel on the side of the furnace using a nut driver. Turn off the furnace at the wall control. To test the pressure switch use a multi meter and measure the continuity of the switch as it opens and closes. Pull the wires off.

How do you test the gas furnace pressure switch. Locate the gas valve. Turn gas on and. Testing a gas line for leaks do it yourself how to fix a leaky gas valve and pressure testing on home natural gas lines gas company wont turn on my gas due t.

Gas pressure test kit top selected products and reviews yellow jacket 78060 complete test kit 0 35 w c by yellow jacket ritchie in stock. The gas valve will have a pressure tap located on it. Wait for the unit to cool if it has been in use. To do this the pressure switch wires are removed and the furnace turned on.

The pressure switch on a furnace may fail or get stuck in an open position and there are few simple checks you can complete before testing the switch. Then screw in your manometer. A pressure switch is designed to sense the negative pressure created by the draft inducer motor during the furnace startup and to shut down the furnace ignition if the air pressure is inadequate. The manometer will give the reading in water column in inches.

Basically the switch needs to be tested to see if it is closing when the pressure diaphragm pulls in. Using a meter test if the switch closes. A multimeter will be needed to test the switch for continuity. Turn the gas off.

How to check the furnace gas valve with a multimeter step 1. Some gas valves will have a pressure tap on both sides while some only have one on the furnace manifold side. Screw back in the gas valve plug using a small amount of pipe dope.