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Would a furnace with a blocked inlet shut down?

Toller Member Posts: 9
A few days ago the inlet on my Trane furnace iced over.  It tried to turn on, failed, waited, tried to turn on, failed...  It did that for an hour before I figured out what was wrong.

Would it have done that forever, or is there something that would just shut it down completely after 100 tries, or something like that?


  • Tom_133
    Tom_133 Member Posts: 822

    Not as familiar with Trane but, like so many other controls out there if the intake frosts over and the pressure switch cant prove then it should shut down and retry perhaps 3 times then lock out. I would call a pro who can come and make sure that it is all working as it should. Peace of mind is worth every dollar you pay for it...
    Montpelier Vt
  • Steve Whitbeck
    Steve Whitbeck Member Posts: 669

    It will continue to try untill the problem is solved. It will try for a while then lock out and then after an hour retry again.
  • Henry
    Henry Member Posts: 995

    it is up to the user to make sure that snow or ice does not block the combustion ir IF it was installed accoding to the certified instruction manual. if it ain't above snow level , extend the air inlet!
  • icesailor
    icesailor Member Posts: 7,265
    Snow Level"

    Yup, and for most all, that's 12" ABOVE the snow level. Which is available on line.

    If you live in a snow area, you must add for the snow level.

    The manufacturers installation manual must be read and followed.
  • Tom_133
    Tom_133 Member Posts: 822
    Trane specific?

    Is that a Trane thing? Typically 3 trys and you are out!
    Montpelier Vt
  • Steve Whitbeck
    Steve Whitbeck Member Posts: 669

    Most furnaces will retry after an hour. Depends on the fault.

    It is usually not snow - at least not nature made snow.

    It is man made snow, created by the furnace exhaust, it then gets sucked into the furnace intake, because the gasses are wet they stick to the inside of the cold intake pipe. This process continues untill the pipe is blocked and the furnace shuts down.
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