Furnace Gas Valve Pressure Test

Turn the gas back on.

Furnace gas valve pressure test.

Turn on the furnace and start it. How to check the furnace gas valve with a multimeter step 1. Wait for the unit to cool if it has been in use. Screw back in the gas valve plug using a small amount of pipe dope.

Turn gas on and. 52 61 good unit by just another buyer worked great for checking gas flow on a couple heaters that we have. To test the pressure switch use a multi meter and measure the continuity of the switch as it opens and closes. Turn the gas off.

A multimeter will be needed to test the switch for continuity. Basically the switch needs to be tested to see if it is closing when the pressure diaphragm pulls in. To do this the pressure switch wires are removed and the furnace turned on. How do you test the gas furnace pressure switch.

The manometer will give the reading in water column in inches. Take out the bolts in the service panel on the side of the furnace using a nut driver. Locate the gas valve. 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 gas valve will have a pressure tap located on it. 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. Pull the wires off.

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