1999 Honday Odyseey EX - Heating Problems

Discussion in 'Odyssey' started by sanjay_work, Dec 9, 2006.

  1. sanjay_work

    sanjay_work Guest

    My 1999 Honday Odyssey does not heat at all. Dealer has filled and
    flushed the heating system. They claim there is nothing wrong with the
    van's heating and works to honda specs.. but in these freezing months,
    I know the car does not heat up... at all.. We all can sit inside all
    bundled up and with heating turned on and are still cold. Till about a
    year ago, we all couldnt turn the heat above 70 without boiling
    ourselves.. now at 90 we are freezing. And yes, engine does show its
    hot, car vent blows what can be best described as "not-cold" air, but
    it is definetaly not hot. Just wondering if anyone else is having a
    similar problem and any suggestions on what to do to fix it. - Thanks,
    sanjay_work, Dec 9, 2006
  2. sanjay_work

    motsco_ Guest


    Is the coolant reservoir full enough? If it's near the MIN mark (because
    you've had work done on the system) you'll have to fill it with premix
    to the MAX mark. Air can get trapped in the heater core and you won't
    get hot air. If you add coolant and it's lower the next evening, you'll
    have to add more until it stops 'sipping' overnight. It's using coolant
    to displace the air in the hoses, head and heater.

    motsco_, Dec 9, 2006
  3. sanjay_work

    TomP Guest

    For furthere diagnosis you need to supply actual temperatures of the heater
    core inlet and outlet lines.
    The inlet pipe should be about 180F. to 200F. and the outlet pipe, should
    be about 10 to 20F. cooler.

    Try going to another dealer or independent repair shop.


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    TomP, Dec 10, 2006
  4. sanjay_work

    Tegger Guest

    wrote in 80g2000cwy.googlegroups.com:

    At some point, Honda switched from mechanical Bowden cables to electrical
    motors to control cabin heating.

    If your controls move as though there were no cables attached (very light
    effort needed), then you have the electronic version. What happens then is
    one of two things, depending on your system's design:
    1) Heater control valve does not open in heater hose, or
    2) appropriate blend door does not open in the heater box inside the
    passenger compartment.

    Either way, not a difficult diagnosis. You need a better dealer.
    Tegger, Dec 10, 2006
  5. sanjay_work

    motsco_ Guest


    With all the money you threw at the Odyssey, did the dealer even
    (suggest or) change your Cabin Filter? If it's plugged up you will only
    get about 40% of the proper air flow through the heater.

    motsco_, Dec 10, 2006
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