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Sorry to hear about that, Karasdad...I had to wait about a week for a replacement heat exchanger. Hope you get your issue resolved soon. I'm thinking that Trane has a real issue with the plastic header on the H.E.

Well, I'd love to agree with you, FurnaceGuy...but it most definitely is fixed. The wind may be an issue for some installations, but it wasn't for mine. The final proof for me was to see the "before and after" of the digital manometer readings. The crack was essentially causing the pressure...

Just an FYI to those of you having problems. I went through the same basic checks that many of you did...pressure switch, paper clip, check the flu lines to see if they were plugged, etc, etc. When you've tried all the basic stuff (I even replaced my pressure switch with a new one (same...

Sounds like what I went through. Basically, with the hose connected, the heater would stop working...pressure in the upper part of the heater was too high, and the pressure switch would (rightfully so) shut it down. 3 flashes of the LED. Swapped the pressure switch, cleaned EVERYTHING...

Just wanted to post a quick update...I finally got my XE90 fixed. The heat exchanger was replaced, because the old one had a huge crack in the plastic interface part where the exhaust gas exits. :eek: Surprised I'm still alive to tell you about this! :D Anyway, that huge crack was...

Well, no. Sorry, I don't believe that for a second...unless you put your furnace outside, or very near an opening. My furnace is as far inside my garage as it can go. Not affected by wind at all. But, as a follow up to this thread, I'm STILL trying to get this issue resolved. My furnace...

Well, I wasn't there to hear everything that he said...so I may need to talk to him on the phone today. I think a 2nd opinion is in order. I am the 2nd owner of the home, so I think the heat exchanger has a 20 year warranty. He said I'd have to pay $100 for shipping and around $300 for labor...

Alright...here's an update. I decided to call my heating repair guy. I wasn't home, but the wife was...he apparently looked inside with a borescope camera and told my wife there was a crack in the heat exchanger and showed her a picture of the inside of my furnace. She said it looked rusty...

Thanks again...I've cleaned the hoses to the pressure switch, and I've verified they're not blocked on the header. There is no water sloshing around in the inducer. Any further ideas?

Also, would a weak draft inducer motor cause this? My heater is 8 years old and I would think they'd last longer than this. Is there a way to test or check the motor or impeller (whatever it is) to see if it's good?

Thanks for that, HVACTech. I was looking at that thing today, but I didn't see how it could have any effect on the pressure switch. Can you elaborate a bit? Update: It took me about 15 minutes to remove, clean and reinstall the trap, then test. It didn't fix it...still getting the 3 flashes.

Hi everyone, I've been dealing with the same problem for a couple years, but it's getting worse. In the past, the unit would cycle a couple times before igniting and providing heat. Toward the end of last spring I awoke to a few cold mornings and found that if I pulled the small hose off the...