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Thread: Pentair NG Mastertemp 400 Blower problems

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    Pentair NG Mastertemp 400 Blower problems

    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.
    22,000gal W/spa & spillway
    Starite S8M cartrige
    IG Plaster, built in 2000
    IC40 SWG, 4000hrs, 3yo
    NG Mastertemp 400
    Solar Cover
    4-20' Sungrabber Panels

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    Mod Squad jblizzle's Avatar
    Join Date
    May 2010
    Tucson, AZ

    Re: Pentair NG Mastertemp 400 Blower problems

    Welcome to TFP!!!

    Thanks for posting this ... it will surely help someone in the future
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
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