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

  • Apr 21, 2009, 04:22 PM
    Joshdta

    OK, still trying to find a good wiring diagram
  • Apr 21, 2009, 04:44 PM
    Trueblue96
    Quote:

    Originally Posted by Joshdta View Post
    ok, still tring to find a good wiring diagram

    http://i42.tinypic.com/vh9v1d.jpg

    That's the diagram.
  • Apr 21, 2009, 04:49 PM
    Joshdta

    Are both of you heat sequencers double stacked like the pic I sent or is one just a single?
  • Apr 21, 2009, 04:50 PM
    Trueblue96
    Quote:

    Originally Posted by Joshdta View Post
    are both of you heat sequencers double stacked like the pic i sent or is one just a single?

    Double one on top of the other.
  • Apr 21, 2009, 04:58 PM
    Trueblue96
    Quote:

    Originally Posted by Joshdta View Post
    are both of you heat sequencers double stacked like the pic i sent or is one just a single?

    Here is a picture of them

    http://i41.tinypic.com/j9c3t5.jpg
  • Apr 21, 2009, 05:04 PM
    Joshdta

    I am about 85% sure the one on the top is your problem, but with out being there is very hard with electric furnaces. Turn the power back on. Turn the heat up. Then turn it down. If it continues to run. Then find something that will not conduct electricity, a small piece of wood, a plactic pipe. What ever and give it a few taps and see if it goes off. Or we can test for voltage. Do you have a volt meter?
  • Apr 21, 2009, 05:07 PM
    Trueblue96
    Quote:

    Originally Posted by Joshdta View Post
    i am about 85% sure the one on the top is your problem, but with out being there is very hard with electric furnaces. turn the power back on. turn the heat up. then turn it down. if it continues to run. then find something that will not conduct electricity, a small piece of wood, a plactic pipe. what ever and give it a few taps and see if it goes off. or we can test for voltage. do you have a volt meter?

    Yes I have one.
  • Apr 21, 2009, 05:14 PM
    Trueblue96
    Quote:

    Originally Posted by Joshdta View Post
    i am about 85% sure the one on the top is your problem, but with out being there is very hard with electric furnaces. turn the power back on. turn the heat up. then turn it down. if it continues to run. then find something that will not conduct electricity, a small piece of wood, a plactic pipe. what ever and give it a few taps and see if it goes off. or we can test for voltage. do you have a volt meter?

    Keep in mind if I kick it over to air the outside unit will come on and stay on no matter what temp I put the thermostat on.
  • Apr 21, 2009, 05:15 PM
    Joshdta

    OK when the unit is calling for heat you will have power on both sides of the sequencer. When the call for heat stops the sencer should cool down and the power should not be going threw. Check from a ground to the right side of the senq first
  • Apr 21, 2009, 05:17 PM
    Joshdta
    You have no other relays in your unit but the two you just sent me a pic of?
  • Apr 21, 2009, 05:17 PM
    Trueblue96

    I also tapped the sequencer with a rubber mallet and it continued to run.
  • Apr 21, 2009, 05:19 PM
    Trueblue96
    Quote:

    Originally Posted by Joshdta View Post
    you have no other relays in your unit but the two you just sent me a pic of?

    Just the relay that the thermostat wires are connected into. I replaced it though.

    It's the top little one.

    http://i41.tinypic.com/bgtd9y.jpg
  • Apr 21, 2009, 05:23 PM
    Joshdta

    Well if you changed the t-stat, and that relay. Then the 2 sequencers are all that is left. Its hard to tell from your picture. Are they the same?
  • Apr 21, 2009, 05:27 PM
    Trueblue96
    Quote:

    Originally Posted by Joshdta View Post
    well if you changed the t-stat, and that relay. then the 2 sequencers are all that is left. Its hard to tell from your picture. are they the exact same?

    No. The top one is bigger and has more leads. The bottom one is about half the size.
  • Apr 21, 2009, 05:30 PM
    Joshdta

    OK the top one then is the one we need to worry about. It contols the heat, the fan for heat, and the fan for ac. The botom is just for the second heat strip.
  • Apr 21, 2009, 05:34 PM
    Trueblue96
    Quote:

    Originally Posted by Joshdta View Post
    ok the top one then is the one we need to worry about. it contols the heat, the fan for heat, and the fan for ac. the botom is just for the second heat strip.

    Ok so I should probably replace it and see what happens?
  • Apr 21, 2009, 05:39 PM
    Joshdta

    That would be my best bet. Like I said I am about 85-90% that's your problem. But with so many wires on a elactric furnace with out me being there is hard to be 100%
  • Apr 21, 2009, 05:40 PM
    Joshdta

    Also, if you check back on here later there are a lot of people that will comment. Maybe someone will agree. Or has a better thought on what to try.
  • Apr 21, 2009, 05:50 PM
    Trueblue96
    Quote:

    Originally Posted by Joshdta View Post
    also, if you check back on here later there are alot of people that will comment. maybe someone will agree. or has a better thought on what to try.


    Ok also the top one has a copper coil under it. Doesn't look like any sequencer I have ever seen. I took some numbers off it and googled them and got nothing.

    3100-20Q552c
    Coil 24VAC
  • Apr 21, 2009, 08:07 PM
    Joshdta

    Sounds like the top one may be just a contactor then.

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