Scotty, last night heat pump quit blowing hot air and today AC did not blow cold, fans working in all speeds. I have the same Duo-Therms as you. I will get on the roof tomorrow and start troubleshooting but would love to see the file that you referenced in your post. I can not find it anywhere would you be so kind as to guide me in the right direction. Before you changed the start capacitor did you check it meter or was there visible damage that made you think it was your problem. Thanks in advance, Mike ( from Grand Oaks)