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

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.