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Furnance will not shut off

Carrier electric unit. The fan will not shut off. Honeywell chrometerm III thermostat off switch has no effect. Only the main breaker shuts off the unit

Comments

  • Jeff Lawrence_25
    Jeff Lawrence_25 Member Posts: 746
    Diagnosis

    It's hard to diagnose a problem over the internet. My best suggestion to you is to call a pro to look at it.

    Sorry I couldn't be more help.
  • Bernie Riddle_2
    Bernie Riddle_2 Member Posts: 178


    > Carrier electric unit. The fan will not shut off.

    > Honeywell chrometerm III thermostat off switch

    > has no effect. Only the main breaker shuts off

    > the unit



    I ran into this problem before. it is in your t-stat I can't remember which one i used but try different ones you will find one that works.
  • tim smith
    tim smith Member Posts: 2,800
    Sequencer stuck!!!

    Almost for sure it is a stuck sequencer causing this. contacts probably fused. Inside control cabinet is where you will find. Don't go in there unless you understand electricity and it's hazards. Tim
  • will smith_4
    will smith_4 Member Posts: 259
    Fan on

    Could possibly be tripping a limit switch which would keep the fan on, could be a stuck relay, or the stat.
  • brucewo1b
    brucewo1b Member Posts: 638
    Along with all the good advice given

    have you done any work in the house lately, a misplaced nail or staple may have penitrated a t-tsat wire, had it happen to a customer who installed a new t-stat and while pulling the existing wire out of the wall scrapped the insulation off the wires and the staple created a short.
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