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Trane XR90 pressure switch error

2453 Views 8 Replies 4 Participants Last post by  supers05
I'm receiving a pressure switch error code on my Trane furnace. This issue seems to be intermittent, but not getting frustrating.

To date I have removed the trap ( washed it out ), blown thru as many hoses as possible, and removed the intake and exhaust ( blowing each out with a dry vac.

The crazy issue is that the furnace will run perfectly for a few days, then start tossing the error code, again. A week ago, I removed the pressure switch vacuum line that goes to the burner box...the furnace fired and ran perfectly...which I assume, it should not have fired.

Anyone ever been confronted with an issue of this nature & what could possibly be the problem? Also, my CO detectors have not detected anything. Wouldn't they sound off if there was an issue with the heat exchanger?

Thanks for reading & look forward to responses.

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What draft is it pulling vs what the pressure switch is rated for?
1 - 1 of 9 Posts
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