I own a 20 year old home that had a heat pump as original equipment. Last winter Electric furnace with 3 ton A coil was replaced and technicians installed to separate AC and Furnace to run as independent units. I had a new 3 ton AC installed last week. Each is on it's own circuit (100A for Furn, 40A for AC). When thermostat is cycled from OFF to AUTO, Furnace breaker trips, disabling AC and Furnace blower motor. When reset, will run and eventually trips. Occasionally AC breaker trips as well. Technicians recommended replacing Furnace breaker. Done to no avail. Now recommending replacement of AC breaker with 60A unit. Is this OK? Is it possible that there is another problem?

 

Curran, read your label and see what the max breaker or fuse size is.....a three ton a/c i ouldnt think would need more then 30amps going bigger isnt the right way to fix the problem. something is causeing it to draw more amps then the breaker will allow. get someone to check it out...