Troubleshooting Gas Furnace Pressure Switch

The pressure switch fitting may have a restrictor inside do not remove.

Troubleshooting gas furnace pressure switch.

Here s how you can fix a stuck gas furnace pressure switch. Checked the limit switch all ok. Replaced the flame sensor it didn t fix the problem and it is very difficult to access on this unit. 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. It should be clear. 102 thoughts on how to test and troubleshoot gas furnace pressure switches. Check the tubing from the inducer.

The switch is connected to hoses and the water in these can sometimes cause a little bit of a problem. Step 1 inspect the control board. 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. 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. If the multimeter does not show any sign of. Other problems that could cause the pressure switch to not open are a dirty blower wheel on the inducer. Also the fittings that the tubing fit into should be clear.