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-   -   Heating/Air staying on (https://www.askmehelpdesk.com/showthread.php?t=344407)

  • Apr 21, 2009, 03:46 PM
    Trueblue96
    Heating/Air staying on
    All of a sudden I noticed my heat was running non stop. So I went to the thermostat and clicked it to the off position, it went off. I decided to see if the air was doing the same. Sure enough flip it over to air the air will run constantly. In both cases it was not just the fan running, the heat heated and the air cooled. In fact if you flip the system from auto to fan it goes off and nothing runs.

    I thought I would try replacing the thermostat first. So armed with a new one I replaced everything, re-stripped wires in case one was broken. Hooked everything back up, flipped the switch to heat and again it would not shut off, same with the air. Again I flipped the switch from auto to fan and it goes off. :confused:

    Today I went and bought a new relay and thought that would for sure fix it. It didn't work same issue's. I even unhooked the red and white coming from the outdoor unit and nothing has changed except for the air not kicking on now. I'm really at a loss as to what it can be. Any help would be greatly appreciated.

    Furnace information:
    Miller E3EB-015H, 017H
  • Apr 21, 2009, 03:48 PM
    Joshdta

    Is this a electric or gas furnace?
  • Apr 21, 2009, 03:50 PM
    Trueblue96
    Quote:

    Originally Posted by Joshdta View Post
    Is this a electric or gas furnace?

    I'm sorry it's all electric
  • Apr 21, 2009, 03:51 PM
    Joshdta

    Then it sounds to me like you have a bad heat senqucer
  • Apr 21, 2009, 03:52 PM
    Joshdta
    http://www.drillspot.com/pimages/63/6339_300.jpg
  • Apr 21, 2009, 03:52 PM
    Joshdta
    When they get hot and stop working the heat will stay on on the heating and the ac mode. Intill the breaker is shut off usually
  • Apr 21, 2009, 03:53 PM
    Trueblue96
    Quote:

    Originally Posted by Joshdta View Post
    then it sounds to me like you have a bad heat senqucer

    Would it also cause the air to kick on and say on?
  • Apr 21, 2009, 03:54 PM
    Trueblue96
    Quote:

    Originally Posted by Joshdta View Post
    when they get hot and stop working the heat will stay on on the heating and the ac mode. intill the breaker is shut off usually

    Ok so when the switch is flipped to air it would cause the outdoor unit and compressor to kick on?
  • Apr 21, 2009, 03:54 PM
    Joshdta

    This actually brings on the heat and the fan
  • Apr 21, 2009, 03:55 PM
    Joshdta
    When you have the ac on is it as cold as it is supposed to be? Odds are the heat is running with the ac
  • Apr 21, 2009, 03:56 PM
    Trueblue96
    Quote:

    Originally Posted by Joshdta View Post
    when you have the ac on is it as cold as it is suposed to be? odds are the heat is running with the ac

    Oh yea very cold.
  • Apr 21, 2009, 03:56 PM
    Joshdta
    No the compressor should only run if the ac is turned down and calling for cooling? Is this a heatpump or strait electric furnace?
  • Apr 21, 2009, 03:57 PM
    Trueblue96
    Quote:

    Originally Posted by Joshdta View Post
    no the compressor should only run if the ac is turned down and calling for cooling? is this a heatpump or strait electic furnace?

    Electric furnace with an outdoor air unit. You can definitely hear the outdoor fan and compressor kick on and the air is cold.
  • Apr 21, 2009, 03:58 PM
    Joshdta
    Is this a newer unit? If so you may not have heat sequencers, but a control board instead.
  • Apr 21, 2009, 04:01 PM
    Joshdta

    The relays in the control board may be going bad.
  • Apr 21, 2009, 04:03 PM
    Trueblue96
    Quote:

    Originally Posted by Joshdta View Post
    The relays in the control board may be going bad.

    The picture you posted, it has two of those lines up vertically.
  • Apr 21, 2009, 04:06 PM
    Joshdta

    Do you notic any burnt or lose wires on them? Make sure to turn the power off before looking
  • Apr 21, 2009, 04:12 PM
    Trueblue96
    Quote:

    Originally Posted by Joshdta View Post
    do you notic any burnt or lose wires on them? make sure to turn the power off befor looking

    I will look. I dabble in all kinds of things. The power is the first thing I do.:D
  • Apr 21, 2009, 04:15 PM
    Joshdta

    I was looking at a diagram of your unit. Up on the blower do you have a control box there?
  • Apr 21, 2009, 04:20 PM
    Trueblue96
    Quote:

    Originally Posted by Joshdta View Post
    i was looking at a diagram of your unit. up on the blower do you have a control box there?

    No all I see is the back part of the blower. It has a bundle of wires coming from the blower to a plug-in. That is all there is coming from the blower. I will see if I can get a picture uploaded.

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