Troubleshooting Gas Furnace Pressure Switch
Furnace pressure switch troubleshooting.
Troubleshooting gas furnace pressure switch. The source of pressure switch problems can sometimes be a pain to track down. Checked the limit switch all ok. If the multimeter does not show any sign of. How do i know if i have gas furnace pressure switch problems.
Step 1 inspect the control board. 102 thoughts on how to test and troubleshoot gas furnace pressure switches. Replaced the flame sensor it didn t fix the problem and it is very difficult to access on this unit. The first step is to examine the control board and check if the switch is stuck due to an obstacle in its path.
Here s how you can fix a stuck gas furnace pressure switch. 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 switch is connected to hoses and the water in these can sometimes cause a little bit of a problem.
Also the fittings that the tubing fit into should be clear. It should be clear. Which is why i made this video that go. The pressure switch is an indicator of pressure problems in the furnace.