Performed an inspection on the electrical system since the tenants had an electrical bill of 600 dollars. Found everything tight in the panel. Found correct voltage and amperage at all connections. Found and replaced the heat pump breaker that was oversized for the heat pump. Found the gfi at the back of the home to be damaged and replaced it with a weather resistant gfi. Outlets that the tenant said were not working are switched outlets. From what the tenant stated, it seems to us that the heat pump stopped getting power from a damaged breaker and therefore the fan was not working. They dropped the temperature down which made the compressor work harder to try to get the temperature down to cool the home. If issue continues, we recommend having the customers hvac company investigate further since the electric is as it should be. Homeowner lives out of town. Said we have the credit card on file.