Have HVAC Questions? Ask an HVAC Expert for Answers
If fuse is blowing this indicates dead short somewhere.Locating short can be time consuming and may take a few fuses to determine where it is. The following are most likely.
2.Skinned or chewed wire between thermostat and units
3.Bad contactors in outdoor unit
4.Skinned or naked wire in indoor or outdoor unit
5.Bad control board
First step is to get several fuses. Then start by disconnecting wires at thermostat and see if fuse still blows.Next disconnect thermostat wires at control board and see if fuse still blows.WE have to determine what in the circuit is shorted.
If that does not solve your problem let me know and I will be happy to guide you in locating the short.
If you have further questions, please let me know.
Thanks for letting me work with you.If my answer has been polite, professional,and thorough, please click one of the ratings before you go. If you still need help let me know!.Expert is not paid for assisting you until you rate answer.Feel free to follow up for 30 days at no additional cost. Bonus always appreciated if you feel justified.
To rate answer, please select one of the stars below.