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    larrycole's Avatar
    larrycole Posts: 2, Reputation: 1
    New Member
    		  
    #1

    Dec 14, 2009, 12:50 AM
    Coleman furnace parts 3120 blower motor
    I have a coleman furnace 3120 model # and my question is what would cause the circuit breaker to trip on the circuit box and not blow the 60 amp. Fuses in the furnace? The furnace is connected to a 100 amp. Breaker. After it is on for awhile the breaker will become warm and trip, could the motor cause the breaker to trip even if it runs both high and low speeds or is it possible for the sequencers to trip the breaker. Heater coil
    Or what


    Bob
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #2

    Dec 14, 2009, 01:10 AM
    You really need a Amprobe electric testing tool to actually find out the exact problem. All else is guess work and that does not work in the HVAC industry very well.
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