Troubleshooting Gas Furnace Pressure Switch

Replaced the flame sensor it didn t fix the problem and it is very difficult to access on this unit.

Troubleshooting gas furnace pressure switch.

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 is an indicator of pressure problems in the furnace. If the multimeter does not show any sign of. The pressure switch fitting may have a restrictor inside do not remove.

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. How do i know if i have gas furnace pressure switch problems. It should be clear. Checked the limit switch all ok.

Here s how you can fix a stuck gas furnace pressure switch. The switch is connected to hoses and the water in these can sometimes cause a little bit of a problem. Checked the resistance on the two vacuum sensors on the firebox blower. Other problems that could cause the pressure switch to not open are a dirty blower wheel on the inducer.

Furnace pressure switch troubleshooting. Check the tubing from the inducer. Which is why i made this video that go. Also the fittings that the tubing fit into should be clear.