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Thread: heating trouble

  1. #1

    heating trouble

    i have a 48tme012 and the only way that I get the heating call to work is to turn the IDF to on,then eveything will run IDF and burners come on and will cycle on the therm for temp. If fan left in auto the unit will not do anything. I disconected the therm wires at unit and jumped out r-w1 no action but r-w1 and g unit starts. The ignitor module and limin switch were replaced July,2012

  2. #2
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    I'm not sure about that unit in particular, but some units must have a G call with W for the furnace to come on.

  3. #3
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    What are the first five digits of the serial number?
    [Avatar photo from a Florida training accident. Everyone walked away.]
    2 Tim 3:16-17

    RSES CMS, HVAC Electrical Specialist

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  4. #4
    Quote Originally Posted by timebuilder View Post
    What are the first five digits of the serial number?
    5105G30610

  5. #5
    Join Date
    May 2012
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    25
    is there a time delay relay in the unit?

  6. #6
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    The unit should start in heat mode with a closure for R to W1. We're there any alarm codes blinking on the igc? Is there a basic stat on it or any other controls?

  7. #7
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    Quote Originally Posted by Dallas Duster View Post
    The unit should start in heat mode with a closure for R to W1. We're there any alarm codes blinking on the igc? Is there a basic stat on it or any other controls?
    I agree. Power to W1 should start the inducer, and the fan will come on after a time out expires.

    You have something amiss here.
    [Avatar photo from a Florida training accident. Everyone walked away.]
    2 Tim 3:16-17

    RSES CMS, HVAC Electrical Specialist

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  8. #8
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    Quote Originally Posted by COMFORTHVAC View Post
    i have a 48tme012 and the only way that I get the heating call to work is to turn the IDF to on,then eveything will run IDF and burners come on and will cycle on the therm for temp. If fan left in auto the unit will not do anything. I disconected the therm wires at unit and jumped out r-w1 no action but r-w1 and g unit starts. The ignitor module and limin switch were replaced July,2012
    I've never seen a module in a 2005 Carrier RTU. Can you post a pic?

    AND...

    Have you inspected that heat exchanger??????
    [Avatar photo from a Florida training accident. Everyone walked away.]
    2 Tim 3:16-17

    RSES CMS, HVAC Electrical Specialist

    AOP Forum Rules:







  9. #9
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    I'm curious as to why the igc board and limit were replaced in July. Were they causing issues in a/c mode?
    Officially, Down for the count

    YOU HAVE TO GET OFF YOUR ASS TO GET ON YOUR FEET

    It was working when I left...
    Liberalism-Ideas so good they mandate them

  10. #10
    Quote Originally Posted by 2sac View Post
    I'm curious as to why the igc board and limit were replaced in July. Were they causing issues in a/c mode?
    THERE WAS A PROBLEM WITH THE A/C IN JULY AND AT THAT TIME THE INDUCER WAS RUNNING ALL THE TIME LIKE THE ROLL OUT WAS OPEN BUT IT WAS NOT BUT FOR THE PRICE OF THE ROLL OUT I REPLACED IT WITH THE CONTROL. IT HAS A W/R TWO STAGE HEAT AND COOL THERM.

  11. #11
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    Once the igc goes into lockout the inducer stays on even after the limit becomes closed. This would have been indicated by the flashing red light. Next question. You said you disconnected the t-stat and then jumped out. Was this done at the unit or inside by the thermostat?
    Officially, Down for the count

    YOU HAVE TO GET OFF YOUR ASS TO GET ON YOUR FEET

    It was working when I left...
    Liberalism-Ideas so good they mandate them

  12. #12
    Quote Originally Posted by 2sac View Post
    Once the igc goes into lockout the inducer stays on even after the limit becomes closed. This would have been indicated by the flashing red light. Next question. You said you disconnected the t-stat and then jumped out. Was this done at the unit or inside by the thermostat?
    I jumped at the unit. r-w1 no change have to jump r-g once the r-g jumper is touched you can remove the jumper and just leave the r -w1 and the unit will keep on running.

  13. #13
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    What is the complete 16 digit model number?

    Quote Originally Posted by COMFORTHVAC View Post
    I jumped at the unit. r-w1 no change have to jump r-g once the r-g jumper is touched you can remove the jumper and just leave the r -w1 and the unit will keep on running.

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