A/C Problem '66 Cad
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500, 472, 425, 368 Discussion, A/C Problem '66 Cad in Cadillac Engine Technical Discussion; I have a good one here, I hope someone knows about it. I have a '66 Fleetwood Brougham and the ...
  1. #1
    ronesr is offline Cadillac Owners Member
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    A/C Problem '66 Cad

    I have a good one here, I hope someone knows about it. I have a '66 Fleetwood Brougham and the A/C has not worked since I have had it, (3 years), I was always going to have it looked at but never did. Yesterday I decided to take the car to a Drs Appt. and on the way there the A/C came on and blew cold. I changed the temp on the wheel and it went over to heat as it should. It worked well on the whole trip. When I got home and shut it off I heard a hissing noise. I checked and found a leak in the radiator, it was down a lot of coolant. I put another radiator in, filled it up, and the A/C will not work now. I figured it HAD to be the heater control valve so I changed that and no dice. So, then I figure it has to be the thermostat and changed that, no dice. So now I am at a loss, HELP.

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  3. #2
    oley427 is offline Cadillac Owners Member
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    Re: A/C Problem '66 Cad

    Dose the A/C clutch engauge when you turn the A/C on? If it dose then feel the large suction line at the compressor it should be cold, if after a about 1 min it's still not cold then it has probably lost the charge.

  4. #3
    DaveSmed's Avatar
    DaveSmed is offline Cadillac Owners Connoisseur
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    Re: A/C Problem '66 Cad

    Sounds like a nice suprise. Has the heat always worked regardless?

  5. #4
    ronesr is offline Cadillac Owners Member
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    Re: A/C Problem '66 Cad

    No, nothing at all worked until the water level got very low

  6. #5
    DaveSmed's Avatar
    DaveSmed is offline Cadillac Owners Connoisseur
    Automobile(s): 1968 Cadillac Sedan deVille, 1994 Chevrolet G20
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    Re: A/C Problem '66 Cad

    Hmm.. not what I thought then. I'll look up the diagrams and come up with another idea.....

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