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Is there any heating/AC guys here?

kissgoodnightkissgoodnight Member Posts: 4,063 ✭✭✭
edited March 2013 in General Discussion
My the blower on my propane furnace will not stop blowing air and no heat is produced. I have plenty of propane.
I tried to turn off the blower on the thermostat but it will not turn off. The only way to stop the blower is to flip the power off.
I replaced the air filters and even batteries in the thermostat. That is the limit of what I know how to do.
Any one know what the problem is? Other than me, of course.
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Comments

  • woodshed87woodshed87 Member Posts: 23,478 ✭✭✭
    edited November -1
    OAKIE And MARC Your Needed[:D][:D]
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  • gmayesgmayes Member Posts: 415 ✭✭✭
    edited November -1
    Mine was doing this last week. My filters were filthy. Changed filters and all is well now.
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  • ithaca4meithaca4me Member Posts: 538 ✭✭✭✭
    edited November -1
    Is it not firing off at all or firing off reaching temperature then shutting off and the blower not turning off. If it is turning on and running but no flame then I would hazard to guess that the ignitor is not working either being spark or hot surface.
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  • TopkickTopkick Member Posts: 4,452 ✭✭
    edited November -1
    May be a flame sensor not working. Sand it well and reinstall. As for the motor continuously running, likely be a stuck fan relay.
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  • MIKE WISKEYMIKE WISKEY Member Posts: 10,043 ✭✭✭✭
    edited November -1
    I've been in hvac for 40 years. you have a 'limit' or pressure switch 'open' the furnace thinks it is over heated (wether real or not) the brand/model makes a difference.
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  • kissgoodnightkissgoodnight Member Posts: 4,063 ✭✭✭
    edited November -1
    The brand is Intertherm.
    The fan will not stop even when the thermostat is turned to off.
    Is this an expensive fix?
    Can I fix it myself?
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  • retroxler58retroxler58 Member Posts: 32,693 ✭✭✭
    edited November -1
    quote:Originally posted by woodshed87
    OAKIE And MARC Your Needed[:D][:D]
    They usually are on here a couple of hours every day... Ought to be along ANY TIME NOW...
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  • retroxler58retroxler58 Member Posts: 32,693 ✭✭✭
    edited November -1
    quote:Originally posted by MIKE WISKEY
    I've been in hvac for 40 years. you have a 'limit' or pressure switch 'open' the furnace thinks it is over heated (wether real or not) the brand/model makes a difference.
    Well hell now, MIKE WISKEY makes three!!!
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  • elect1mikeelect1mike Member Posts: 4,585 ✭✭✭
    edited November -1
    Mike got it right has to be a limit
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  • MudderChuckMudderChuck Member Posts: 4,105
    edited November -1
    I'm going with an over amped or cheap relay. The contacts are welded together. The relays all eventually fail, one common failure mode is the plating on the contacts burns off and they can weld together. I've even seen the return spring fall off. On many you can remove the cover and do a visual inspection, a good light and a close look usually tells the tale.

    Most of my knowledge is old school, things have evolved some.
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  • Marc1301Marc1301 Member Posts: 31,895 ✭✭✭
    edited November -1
    I agree with Mike largely due to the fact the burner is not firing, or is not staying on.

    Even though you have replaced the filters, there is a possibility that an A-coil for A/C mounted on top is plugged.

    If this were the case, your limits would take out the burner quick from low airflow. The fan SHOULD shut off after awhile though.

    It's either a bad limit, or a 'welded' fan relay combined with a condition as I mentioned that won't allow the burner to stay on.
    "Beam me up Scotty, there's no intelligent life down here." - William Shatner
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  • TopkickTopkick Member Posts: 4,452 ✭✭
    edited November -1
    stuck fan relay.


    I called it first!

    [;)]
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