We were originally called out here to take a look at the bathroom heater which kept tripping the breaker I opened up the heater and found the wires had arced and connected with the metal casing around the heater which caused it to trip the breaker the customer already had a replacement heater that fit perfectly inside the metal framing so I swapped that out real quick turn the breaker on and the heater still was not working so I examined the electrical panel and found that the two pole 20 amp breaker was actually sizzling causing the circuit to not work properly I remove And replace the 2 pole 20 amp Square D Q0 electrical breaker with a company supplied turned on the breaker and then everything worked fine