For this job, I came out to take a look at 110 amp breaker in the main panel supplying a disconnect feeding an electric furnace. Within the disconnect is a 50 amp breaker for the heat pump and a 60 amp for the auxiliary heat, feeding the unit from the disconnect. I checked all points of service from electrical standpoint at each point of disconnect. I did find loose connections on the load side in the disconnect at the breakers where I got multiple full rotations tightening the screw on the breaker. During our diagnostic, we had the customer turning the auxiliary heat on in addition to heat pump running and performed a load test with no abnormal findings. I pulled the breaker out of the panel as well and everything looked fine. This is the first season during the brutal cold with there less than 5 year old unit having an issue. I believe it was just working as hard as it could to pump and provide heat during that time as the customer stated it would typically happen at night during the
