Question about 2005 Hyundai Accent

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No heat fan works, but no heat

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  • Hyundai Master
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Is the coolant level full? What does the temp gauge read on the dash? Can you hear a difference in air flow out the vents if you switch from full hot to full cold?

Posted on Dec 30, 2012

  • 13 more comments 
  • Degar Dec 30, 2012

    Jeremy, I just changed the coolant this morning and although some heat difference between cold setting and hot. It is not heating properly. Please advise. Thank you for your time and consideration. Degar

  • Degar Dec 30, 2012

    The heat gauge remains perfectly centered between hot and cold.

  • Jeremy W.
    Jeremy W. Dec 30, 2012

    And this started before or after you changed coolant?

  • Degar Dec 30, 2012

    More than a year ago in the summer time so I never really addressed it properly. I also forgot to mention that the fan works fine in all 4-ranges.

  • Jeremy W.
    Jeremy W. Dec 30, 2012

    When the engine is warm feel the two hoses going to the heater core near the firewall. One should be really hot and the other should be a little cooler. If one is really cold that there is no flow of coolant through the heater core. It may be plugged with debris. If this is the case the first thing I would try is backflushing the heater core. If that doesn't work that the heater core may need to be replaced.

  • Jeremy W.
    Jeremy W. Dec 30, 2012

    Also check to see if this has a heater control valve. If it does it would be on one of the heater hoses going to the heater core. I don't remember if Hyundai uses them or not.

  • Jeremy W.
    Jeremy W. Dec 30, 2012

    The other possibility is there is an air pocket in the heater core. After you checked coolant did you run the engine with the radiator cap off to burp the air out of the system?

  • Degar Dec 30, 2012

    Ten-four! It burped a couple of time and I added another cup or so and the burping stopped.

  • Jeremy W.
    Jeremy W. Dec 30, 2012

    Let me know what you find.

  • Degar Dec 30, 2012

    Situation still the same, i.e., a hint of heat.

  • Jeremy W.
    Jeremy W. Dec 30, 2012

    I listed several things for you to check, what did you find with those?

  • Degar Dec 30, 2012

    All negative results

  • Jeremy W.
    Jeremy W. Dec 30, 2012

    You didn't tell me if you felt the heater hoses or looked for a heater control valve!

  • Degar Dec 30, 2012

    Negative; I am not a mechanic and do not have diagram of said same. I am going to look for them and will post as soon as I find them. Thanks for your patience.

  • Degar Dec 31, 2012

    I went to the AutoZone store today and had someone show me the hoses leading to the core and they were hot and pressurized. Do they by chance have a thermostat? Thanks for all you time and consideration. Degar

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