A/C blowing warm air

Tiny
TOBY LIVINGSTON
  • MEMBER
  • 2008 JEEP LIBERTY
  • 3.7L
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 110,000 MILES
Have A/C not blowing cold air. Took to mechanic and connected pressure gauge. A/C on coldest setting. The high pressure side bottoms out over 400 on their gauge and shuts down the compressor. Has new compressor, expansion valve. The mechanic thinks its a clogged condenser or high side hose. Any ideas?
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Wednesday, July 10th, 2019 AT 5:20 PM

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Tiny
STEVE W.
  • EXPERT
Welcome to 2CarPros. I would agree with the blockage assessment. What was the reason for the new compressor? If it was for compressor internal failure it probably sent shrapnel into the system. With the condenser on that Jeep it would be almost impossible to flush it all out. I would recover the charge and then see if you can get flush to go through the lines and condenser.
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Wednesday, July 10th, 2019 AT 7:44 PM
Tiny
TOBY LIVINGSTON
  • MEMBER
I took it to a Jeep dealership originally because it kept leaking out the Freon. Told me it was the compressor. Replaced it, same issue. Then they told me the expansion valve. Replaced it, same issue. Then I found the schrader valve on low side leaking. Replaced it. Now Freon stays at pressure just the hot air blowing out.
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Thursday, July 11th, 2019 AT 4:19 AM
Tiny
STEVE W.
  • EXPERT
In that case I would start at the beginning. Have the AC charge recovered, remove the lines and see if you can get air or flush to go through the lines and the condenser. The high pressure suggests a blockage in part of the system. A system flush could clear it out. Then recharge and see if you have working AC.
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Thursday, July 11th, 2019 AT 1:25 PM

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