Recent content by karasdad

Thanks lostpilot28, I had a builder friend of mine come over to check it out. He said the Trane XR90 is a single speed unit that runs wide open at 120 ton BTU all the time; it's a basic contractor model for large homes greater than 5000 sq ft. However, the ducting design I have limits the...

Well, I spoke too soon. Dealer called and said the replacement heat exchanger would not be available for 30 days, none in stock anywhere. Five weeks in the midst of the Seattle winter is a daunting prospect. $3500 for a brand new replacement furnace. will consider it because I have no choice...

Hey lostpilot28, the Trane specialist came over and you are absolutely right, there was a four inch crack in the heat exchanger. They are replacing it on Friday along with the high limit switch on the top burner and rollout sensor, both of which they think have been exposed to excessive heat...

my five year old XR90 is experiencing the same three blinking lights. It takes about three or four inducer cycles to get it fired up. The pressure switched was replaced and it ran fine for about a month and then began the three lights began blinking again. I can pinch the lower hose for about...

Thanks Gerrycurl21 for a great write up. I am experiencing a similar problem with my seven year old Trane XR90. my service guy just replaced the pressure sensor and it ran fine for a week and then started giving me the same three blinking light problem intermittently. I could trick it into...

it just unscrews from the inducer fan assy after you unplug the two wire plug. mine is part numbered B342017P02. I think you can purchase it from the distributor. looks like it senses some magnetic field passing by like a speedometer.

Hey Paul54426M, that's not the "start capacitor" circled, it's the run limit switch and you can just remove it from the old assembly and reuse it. the black wire plugs into the white connector along with another black wire on the harness already attached. the green just goes onto the frame for...