2000 Mercury Sable heat to cool

Tiny
FESTUS01
  • MEMBER
  • 2000 MERCURY SABLE
Air Conditioning problem
2000 Mercury Sable 6 cyl Front Wheel Drive Automatic

my a/ suddenly started blowing heater air really hot air
what is the possible solution to this problem freon is good pressure registered 40-45 lbs
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Wednesday, August 6th, 2008 AT 2:37 PM

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Tiny
MERLIN2021
  • EXPERT
I assume this reading was at the low side port with one of those recharge cans? 40-45 is not a good reading! If the compressor is running or not! If the compressor starts, hook up a manifold gauge set that can read both high and low side, high should be 200 psi and low 30 psi. Turn a/c control to coldest setting. There is a low pressure switch that will not allow the compressor to run if the charge gets too low.
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Wednesday, August 6th, 2008 AT 2:57 PM

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