Results 1 to 9 of 9
  1. #1
    Join Date
    Dec 2006
    Posts
    2

    The blower is going nuts

    Even with the system switched to off on the thermostat, the blower turns on about every hour for 5 minutes or so. I replaced the thermostat, but the symptom still persists. There is no problem with either heating or cooling, but I can't figure out how the blower can turn itself on without control from the thermostat. Any ideas?

  2. #2
    Join Date
    Jul 2001
    Posts
    3,112
    Why did you replace the thermostat? Which blower areyou talking about?

  3. #3
    Join Date
    Aug 2004
    Location
    North Richland Hills, Texas
    Posts
    14,915
    What thermostat do you have?
    Does your system have a fresh air intake, with a control system for it?

    Some thermostats have a "circulate" setting that will run the fan periodically to circulate the air in the house.

    Some fresh air intake setups will run the system fan, independent of thermostat calls.
    If more government is the answer, then it's a really stupid question.

  4. #4
    Join Date
    Dec 2006
    Posts
    2

    The blower is going nuts

    I replaced the thermostat because it appears the only thing to have control ove the blower. The blower is located in the furnace unit.

    There is no fresh air circulation and there are no settings for the blower on the furnace.

  5. #5
    Join Date
    Jun 2006
    Posts
    491
    does it have a draft inducer motor on the furnace or is it an older style, direct vent furnace? (when the blower motor you hear running when you feel it shouldn't be, is that accompanied by air coming out your supply registers?) if its an older furnace, you could have a problem with your fan limit control. we need some more info. by the way, i'd recommend getting someone out to look at it vs. just replacing parts that you don't know if they're bad or not. it might end up costing you more and will possibly create further problems for whoever ends up having to fix it in the event you can't.

  6. #6
    Join Date
    Jul 2001
    Posts
    3,112
    Looks like changing the thermostat didn't have any control over the blower.

  7. #7
    Join Date
    Nov 2007
    Location
    Washington State (on the Peninsula)
    Posts
    80
    How long have you had this system?
    How long have you noticed this symptom?
    Is this a furnace and A/C system or Heat pump?

    My first Impression is that there is a fresh air control bringing on the blower.

  8. #8
    Join Date
    Aug 2006
    Location
    Longview,TX.
    Posts
    83
    Is it a gas furnace with a standing pilot?

  9. #9
    Join Date
    Mar 2004
    Location
    Illinois
    Posts
    6,959

    The best advice...

    is call a pro to check it, you've already wasted money on a tstat, don't waste anymore.

    Sorry, no diy on the site.

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