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Thread: katbill

  1. #1
    Join Date
    May 2013
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    I hope I'm finally at the place to ask my question...if not, somebody set me straight.

    Here it is: I've got a 10 year old Amana 4ton HVAC....and even when its turned OFF ...the fan comes on and runs with no apparent purpose. I have noticed it happens most when its raining.
    Driving me up the wall and local techs don't know the answer.


  2. #2
    Join Date
    Oct 2010
    Anderson, South Carolina, United States
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    Is the fan switch on tstat in the on position? If not its either a bad board, tstat, relay, shorted wire, etc. you will need to find a contractor to fix the issue

  3. #3
    Join Date
    Jan 2013
    Western Ky
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    check t stat or blower relay

  4. #4
    Join Date
    Jun 2003
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    I put in a 2-ton cdu a few weeks ago, existing A/H, used to run on 22. Recovered 22, nitro'd lines, installed cdu, filled it with isceon mo99. Overcharged the HELL out of it because it's so new to me. Actually called DuPont I believe it was to ask for pressures...All my PT charts are old...So they say its same psi as 22, supposedly, and sure enough it's done and running.

    Idiot counter guy at supply house said you can just dump mo99 on top of 22. My fault...I KNEW you couldn't or they would be the SAME...I listened to a counter salesman...DOH

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