How do I repair A/C

Tiny
RUT
  • MEMBER
  • 1985 LINCOLN TOWN CAR
  • 35 MILES
A/c Blows cold air at idle and when foot is off accelerator but when I press the gas pedal and put engine under load, hot air takes over and blows in. At idle, I turn the A/C off and on and it sounds like the vent door is opening and closing fine. I think its a vacuum leak but cant seem to locate one. Any help where to look and am I on the right track?
Thanks
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Friday, September 30th, 2011 AT 6:28 PM

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Tiny
DOCFIXIT
  • EXPERT
Suspect faulty vacuum check valve VCK-K
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Friday, September 30th, 2011 AT 6:42 PM

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