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Furnance will not shut off

Overheated
Overheated Member Posts: 1
in THE MAIN WALL
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: 2,807
    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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