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  1. #1
    Join Date
    Dec 2008
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    1
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    A/C doesn't turn on

    Problem: Honeywell wall thermostat (7 years old) was turning central A/C on and off perfectly as recently as 1 hour ago. However, suddenly the following is happening:

    Switches set to COOL and AUTO, nothing happens (no A/C, no fan) even though temp is set to 60 and room temp is 80.

    Switches set to OFF and FAN ON, the fan comes on.

    Switches set to COOL and FAN ON, fan comes on but no A/C.

    Any thoughts why the COOL/AUTO combo suddenly doesn't work?

    Thanks.

  2. #2
    Join Date
    Jan 2004
    Location
    PA
    Posts
    70,422
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    The A/C is broke.

    Time to have a service tech check it out for you.

    Sorry, this is not a DIY site. So we are not allowed to give out DIY advise.

    Please read Site Rules Thank you.
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    How-to-apply-for-Professional

    How many times must one fix something before it is fixed?

  3. #3
    Join Date
    Jul 2006
    Posts
    6,644
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    Hmmmmmmmmmmm ive never heard of anything like it before. Wonder what it could be?
    You sure are cocky for a starving pilgrim.

  4. #4
    Join Date
    May 2002
    Location
    Houston Texas
    Posts
    6,363
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    Well it could be a bad thermostat, brokrn wire, bad control board, bad relay. As Beenthere said call a pro before you cost yourself more money!!

  5. #5
    Join Date
    May 2009
    Location
    Earth
    Posts
    2,232
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    Could be the Proton Modulator is going bad, that is very common on these units.

  6. #6
    Join Date
    Feb 2008
    Location
    Waffleville
    Posts
    10,462
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    Quote Originally Posted by 2001 View Post
    Could be the Proton Modulator is going bad, that is very common on these units.
    or the flux capacitator
    If Guns Kill People, Do Pencils Misspell Words?

    http://www.youtube.com/watch?v=An2a1...eature=related

    Before we work on artificial intelligence why don't we do something about natural stupidity?

  7. #7
    Join Date
    Apr 2009
    Location
    R.O.T.
    Posts
    301
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    What about the kanooter valve?

  8. #8
    Join Date
    Apr 2009
    Posts
    29
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    Talking

    There are some funny people here.
    In all serousness as beenthere said it is time to call a tech. It could be something simple as a loose connection or something a little more technical, in any case, you should have a tech check it out, as well as check out the system as a whole, before it gets really hot and humid.
    A properly maintaned unit will last a long time, pre season service check is cheap compared to a middle of a hot humid summer no cooling ( both in price and family harmony).

    Jim

  9. #9
    Join Date
    Jul 2006
    Posts
    6,644
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    Thanks guys i needed that, was hoping someone would pile on.

    It really could be anything so unfortunately you will have to call someone, even if we could help there are just to many things and we cant have you burning your house down.
    You sure are cocky for a starving pilgrim.

  10. #10
    Join Date
    Jul 2007
    Location
    Delaware
    Posts
    3,824
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    Something you could check as a homeowner (You should be checking) is to see if the drain pan is full of water. You could have a safety switch on the system to prevent damage to the home if the drain becomes clogged. This is good info to tell the service tech.
    Always here

  11. #11
    Join Date
    Feb 2008
    Location
    Waffleville
    Posts
    10,462
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    right! check the flapper valve bearings
    If Guns Kill People, Do Pencils Misspell Words?

    http://www.youtube.com/watch?v=An2a1...eature=related

    Before we work on artificial intelligence why don't we do something about natural stupidity?

  12. #12
    Join Date
    Apr 2005
    Location
    N. E. Missouri
    Posts
    9,750
    Post Likes
    No, no, no. The flapper valve bearings wouldn't allow the fan to blow. Sounds like the heat removing conditionator.

  13. #13
    Join Date
    Nov 2004
    Posts
    977
    Post Likes
    You have to be careful, some of those Honeywall wall thermostats had bad kernalator valves.

    The floor mount thermostats were non-hibachi units, couldn't ever trust them after about
    7 years.

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