Troubleshooting Gas Furnace Pressure Switch

Here s how you can fix a stuck gas furnace pressure switch.

Troubleshooting gas furnace pressure switch.

Other problems that could cause the pressure switch to not open are a dirty blower wheel on 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. If the multimeter does not show any sign of. Checked the resistance on the two vacuum sensors on the firebox blower.

The first step is to examine the control board and check if the switch is stuck due to an obstacle in its path. The pressure switch fitting may have a restrictor inside do not remove. Which is why i made this video that go. The switch is connected to hoses and the water in these can sometimes cause a little bit of a problem.

How do i know if i have gas furnace pressure switch problems. The source of pressure switch problems can sometimes be a pain to track down. Also the fittings that the tubing fit into should be clear. Checked the limit switch all ok.

Step 1 inspect the control board. It should be clear. The pressure switch is an indicator of pressure problems in the furnace. Check the tubing from the inducer.