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  1. #1
    Join Date
    May 2017
    Posts
    3
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    Geothermal AC not working

    Good afternoon folks... I am at wits end. (i have a pro coming in a couple days). ive been a homeowner with geo for 4 years. we built this house and its everything we want. except about 3 times until recently per year the geo ac would stop working.
    Its a Honeywell board.

    Anyway, what happens or is happening now is Cool 1 is green (meaning its on) and fan is green (meaning on). Cool1 is on for zone 1 which is upstairs.
    problem is zone 1 is 75 degrees when the thermostat is set to 71.
    If i trip the breaker or run a purge by stepping through the settings (it does it automatically) it switches on, cools for a bit, then goes right back to this.

    I have NO idea what the tech has done 10 times prior to fix it, but it works for months or til the next summer. But I fired those guys and am working with a new company that supposedly knows more.

    Problem is, they cant get here til tuesday and its warm.

    Any help would be appreciated.
    thanks

  2. #2
    Join Date
    Jan 2012
    Location
    Missouri, USA
    Posts
    1,523
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    Any refrigerant added in the past?

  3. #3
    Join Date
    May 2017
    Posts
    3
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    Thread Starter
    Quote Originally Posted by ksefan View Post
    Any refrigerant added in the past?
    its only a fur year old system and its been doing it since year 1 , 3 months after we moved in... i cant imagine it needed refridgerant that quickly..

    in case the people that did it are that dumb, how would i go about checking it? its a full geo system, so no outdoor unit at all.. im not an hvac guy at all.
    thanks

  4. #4
    Join Date
    May 2017
    Posts
    3
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    Thread Starter
    ok, im 99% sure i figured it out.

    The pvc drainage pipe running from the unit to the drain was not acting right... I had to get a little rough with it but I managed to loosen a midway spot and opened it up there... water came pouring out , probably near a gallon in total.
    That alone threw up warning alarms for me. Im not an hvac guy as I said, but I know that the drain is a trickle, not a deluge.
    I looked in the pipe that i took off and it was clogged tight.. completely sealed off. I rapped it on the concrete and all this junk came out. Replaced it and the flow is great again.
    The unit kicked on and the cold air is flowing. Now I could get it to pump some air temporarily, but never more than 15-20 minutes. we will see how this goes, but im fairly confident in the fix.

  5. Likes ksefan liked this post.
  6. #5
    Join Date
    Jan 2014
    Posts
    77
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    Sounds like sludge buildup in the condensate then the system goes into a condensate overflow fault.

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