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If i disconnect my thermostat & the fan continues to run what is the problem?

  • Answers
  • It's a leftist fan.

    How about the fan relay contacts have stuck together?

    or

    The plenum mounted blower temperature/limit switch is stuck? They used to call this a bonnet control.

    Now if you shut off your house MAIN circuit breaker and the fan keeps running, I would be concerned.
    M. · 1 0
  • You disconnected something.
    John Alden · 2 1
  • I'd look at a stuck closed relay as the problem.
    Marko · 0 1