I arrived at our clients home to a blank unresponsive thermostat. Our client had no power for about 2 hours due to last nights storm. I first proceeded to the electrical panel and ensured all the breakers were turned on. I then went into the attic and found a blown fuse. I replaced the fuse but proceeded to test the outdoor heat pumps equipment. I tested the contactor and answered all of the wiring was secure. The unit turned on and began cooling. I discussed with our client how the outdoor contactor and thermostat are directly connected to the failed fuse. We discussed how adding a surge protector could help protect her equipment and she elected to I install one today. I did not charge her for the replaced fuse. After replacing the fuse I tested the system to ensure it was cooling and set the thermostat to 72º.