Troubleshooting Gas Furnace Pressure Switch

The switch is connected to hoses and the water in these can sometimes cause a little bit of a problem.

Troubleshooting gas furnace pressure switch.

102 thoughts on how to test and troubleshoot gas furnace pressure switches. Check the tubing from the inducer. Remove the pressure switch wires turn the furnace on the draft inducer fan motor will begin to run as air is pushed out of the vent a vacuum is created which should cause the switch to close. Checked the resistance on the two vacuum sensors on the firebox blower.

The pressure switch fitting may have a restrictor inside do not remove. The pressure switch is an indicator of pressure problems in the furnace. Checked the limit switch all ok. Here s how you can fix a stuck gas furnace pressure switch.

If the multimeter does not show any sign of. Which is why i made this video that go. The first step is to examine the control board and check if the switch is stuck due to an obstacle in its path. Also the fittings that the tubing fit into should be clear.

Furnace pressure switch troubleshooting. Step 1 inspect the control board. Other problems that could cause the pressure switch to not open are a dirty blower wheel on the inducer. The source of pressure switch problems can sometimes be a pain to track down.