Troubleshooting Gas Furnace Pressure Switch

Also the fittings that the tubing fit into should be clear.

Troubleshooting gas furnace pressure switch.

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 pressure switch is an indicator of pressure problems in the furnace.

It should be clear. Checked the limit switch all ok. Other problems that could cause the pressure switch to not open are a dirty blower wheel on the inducer. Check the tubing from the inducer.

How do i know if i have gas furnace pressure switch problems. If the multimeter does not show any sign of. 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 switch is connected to hoses and the water in these can sometimes cause a little bit of a problem. The source of pressure switch problems can sometimes be a pain to track down. Here s how you can fix a stuck gas furnace pressure switch. Replaced the flame sensor it didn t fix the problem and it is very difficult to access on this unit.