Furnace Gas Valve Pressure Test

The manometer will give the reading in water column in inches.

Furnace gas valve pressure test.

52 61 good unit by just another buyer worked great for checking gas flow on a couple heaters that we have. 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. Basically the switch needs to be tested to see if it is closing when the pressure diaphragm pulls in. To test the pressure switch use a multi meter and measure the continuity of the switch as it opens and closes.

Take out the bolts in the service panel on the side of the furnace using a nut driver. Using a meter test if the switch closes. Wait for the unit to cool if it has been in use. Turn off the furnace at the wall control.

Turn the gas off. Pull the wires off. 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. Then screw in your manometer.

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. 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. To do this the pressure switch wires are removed and the furnace turned on. Locate the gas valve.

Turn on the furnace and start it. The gas valve will have a pressure tap located on it. Locate the pressure tap on the gas valve and unscrew the plug. 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. Turn gas on and. Turn the gas back on.