Problem: I own several rental properties. I am having a problem with moisture buildup in my pressure tubes on my 80% furnaces. The tubes stop up with water and the furnaces shut down.
Answer: FYI, regarding moisture buildup in pressure tubes, I simply moved the pressure switch above where the tube connects to the inducer and the moisture problem went away (on both Goodman & Rheem furnaces). Below we have a real good Youtube video which shows how to troubleshoot pressure switch problems. This Youtube video was made by grayfurnaceman. Thanks grayfurnaceman! We sell many different types of pressure switches on the following page: Please click here to see the pressure switches we sell. If you have any other questions please email us at: firstname.lastname@example.org or comment below. We would love to help you out and have your business!