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    Furnace blower on - no Heat

    Asked Oct 13, 2007, 04:04 PM 20 Answers
    I have a Carrier furnace with an automatic ignition. The fan is constantly running but it is not heating.

    Additional Information:
    Model 58PAV: The Red Led Status light is rapidly flashing - which according to the manual means 'Line voltage (115VAC) polarity reversed. If twinned, refer to twinning kit instructions'. I do not have a clue what 'Line voltage (115VAC) polarity reversed... ' means. The Furnace was working fine last year and no one touched any wires -- how did the polarity get reversed?

    I will really appreciate if someone can explain to me what can I check and how?

    Thanks

    Last edited by aulakhbs; Oct 13, 2007 at 09:32 PM.
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    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 434
    Heating & Air Conditioning Expert
     
    #2

    Oct 13, 2007, 06:50 PM


    Usually this is a symptom of a burner problem. You could have a problem with the draft inducer fan motor or circuit board. It could also be as easy as a sensor. If it is spark ignition could be the safety control or spark box. You need to check the circuits with a meter to tell which part is bad.
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    labman's Avatar
    labman Posts: 10,580, Reputation: 551
    Uber Member
     
    #3

    Oct 13, 2007, 06:58 PM
    Check the high limit switch. It may be signaling a false overheated condition. If so, the gas will shut off and the blower run until the condition clears. You may find some help with the switch in the sticky, http://www.askmehelpdesk.com/heating...tml#post664441
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    T-Top's Avatar
    T-Top Posts: 1,868, Reputation: 100
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    #4

    Oct 13, 2007, 08:11 PM
    Sounds like you have a open limit or blown 24 volt fuse. On carrier, the blower runs all the time if a limit is open or if 24 volts is lost going to the control board.
    Helpful (1)
    lasan's Avatar
    lasan Posts: 13, Reputation: 1
    New Member
     
    #5

    Mar 21, 2009, 07:39 AM
    Quote Originally Posted by aulakhbs View Post
    I have a Carrier furnace with an automatic ignition. The fan is constantly running but it is not heating.

    Additional Information:
    Model 58PAV: The Red Led Status light is rapidly flashing - which according to the manual means 'Line voltage (115VAC) polarity reversed. If twinned, refer to twinning kit instructions'. I do not have a clue what 'Line voltage (115VAC) polarity reversed ...' means. The Furnace was working fine last year and no one touched any wires -- how did the polarity get reversed?

    I will really appreciate if someone can explain to me what can I check and how?

    Thanks
    Hi,Have you fix your Carrier furnace?If you did could you tell me what is wrong with?I have a furnace same model with the you have,just about 6 yrs old it's has the same problem with your furnace.Would you tell me how to fix it?Thanks
    Helpful
    lasan's Avatar
    lasan Posts: 13, Reputation: 1
    New Member
     
    #6

    Mar 21, 2009, 07:55 AM
    Quote Originally Posted by hvac1000 View Post
    Usually this is a symptom of a burner pr.You could have a problem with the draft inducer fan motor or circuit board. It could also be as easy as a sensor. If it is spark ignition could be the safety control or spark box. You need to check the circuits with a meter to tell which part is bad.
    Hi,could you help me.My furnace Carrier model 58pav about 6 yrs old,it has a problem cold air out and no heat,I check a blinking in furnace it blink 3 times stop and blink 1 more,after that it blinking the same (3times stop and 1 more) What is that problem.Thanks
    Helpful
    Mikie D's Avatar
    Mikie D Posts: 45, Reputation: 1
    Junior Member
     
    #7

    Mar 21, 2009, 05:38 PM

    Most of the time it's the high limit switch pull the wires of and ckeck with a volt meter to check continuity it should be made or just jump it out if it starts you know the limit switch is bad. Good luck Mikie D
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    KC13's Avatar
    KC13 Posts: 2,556, Reputation: 98
    Ultra Member
     
    #8

    Mar 22, 2009, 04:30 AM
    The fault code you are seeing is either "13" or "31". Look for a label titled "SERVICE" on the front panel and follow the instructions at the top to determine which code is being displayed.
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    lasan's Avatar
    lasan Posts: 13, Reputation: 1
    New Member
     
    #9

    Mar 24, 2009, 09:36 AM
    Thanks for your adviser,If a fuse blown I need to change a new fuse but I do not know where is a fuse locate?Thanks
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    lasan's Avatar
    lasan Posts: 13, Reputation: 1
    New Member
     
    #10

    Mar 24, 2009, 10:09 AM
    Quote Originally Posted by Mikie D View Post
    most of the time its the high limit switch pull the wires of and ckeck with a volt meter to check continuity it should be made or just jump it out if it starts you know the limit switch is bad. Good luck Mikie D
    Hi , I push a limit switch to reset and the heat came on but it runs about 2 -3 minutes and does not have anymore heat come out just a cold air?A red light blinks 3 short 1 long and stop.Thanks all for helping.
    Helpful

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