Hi all, first post and I'm just trying to help a few people out with a problem I had and couldn't find the answer to. So hopefully this thread will become searchable on the internet and help a few people out like this site has done for me numerous times.
I had a problem with my pentair natrual gas mastertemp 400, the blower motor would turn on backwards or not spin at all and the "need maintenance" light would come on. Everything I read online said to replace the blower for 300$. I talked to an electrical engineer and ended up removing the back cover of the blowers electric motor and replacing the start capacitor for $16. Worked like a charm. I could not find a 120v capacitor but you can use a higher voltage capacitor as long as all the other parameters are the same. Hope this helps.