First zone is A/C unit and furnace and both work fine... Second zone is a heat pump, not really sure what this means, but I have a fan outside and some other unit in the attic. Last summer I was having issues with keeping the house cool. Just thought it was too hot of a day to keep up and left it at that. This winter, had no issues heating the house with either zone. This past Monday, the second floor was 80 degrees, thought it was time to turn the A/C on...after an hour+ running it was still 80 degrees. The next morning it was 79 degrees upstairs and a nice cool 68 downstairs. Search this forum a lil bit and decided to see what it could be. I replaced the start capacitor today and the fan outside still does not spin. No breakers are tripped. Any ideas?