Anyone seen this before.....

Discussion in 'The Big Chill' started by cobravii, Sep 25, 2018.

  1. cobravii

    cobravii Well-Known Member

    I have a 1964 Buick Electra with factory a/c.

    My heater fan won't shut off when i turn the key off. More precisely it won't shut off if the A/C is on. If I set it to vent or heater it will shut off with the heater fan lever and I can adjust the fan speed. If I turn the fan lever to on in any setting it stays running even when the key is turned off.

    Any thoughts or ideas are welcome.
  2. buick64203

    buick64203 Just plum crazy Staff Member

    So just so I understand, with the AC on, it wont shut off, but with the heater on, it shuts off? Maybe the power going to the compressor is back feeding to the heater? Its kind of a guess but I would start looking at the heater controls/ switches
  3. Matt Knutson

    Matt Knutson Well-Known Member

    Is this "out of the blue" or did some work get done to the car recently? Does the switch feel the same when you move it around?
  4. cobravii

    cobravii Well-Known Member

    This is a complete frame off resto. The firewall and all the A/C components including harness is from a donor car. My car did not originally have A/C.
  5. telriv

    telriv Well-Known Member

    Probably the high blower relay. I just did one on a '68 & got the relay from advanced. Bring the old one with you to match to be certain.

    Tom T.

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