air conditioning woes

[9_8_L_S_C]

Had air recharged at jiffy lube and worked fine for a couple of weeks-then it seemed to get warmer and warmer-took it back and they said it still had 2 pounds in it -so they sucked it out and refilled and wont get colder then 70.The compressor kicks on and then off and back on-stays engageds for 2 seconds then off 2 seconds.Any ideas

 

[rmac694203]

Take it to someone more knowledgeable than Jiffy Lube. You probably have a restriction or something that is creating too high of a pressure, so the compressor is turning off to prevent damage.

 

[9_8_L_S_C]

restriction in the lines?contamination perhaps

 

[rmac694203]

They should have read the pressures at least to see what it was running. If it's not leaking but it's still running warm there's a problem somehwere. Could be a restriction in the lines, I'm not sure. Like I said, the guys at Jiffy Lube probably arent the best AC techs out there.

 

[whiplash15]

From past experience, I had a Kenworth that drove me nuts. Was in 4 different shops across the US. Would run ok for about an hour and then got warmer and warmer. At about $450 a crack it gets old real quick. Finally after many threats, then cajoling etc, I sat in the shop for about an hour running the air until the malf showed up. Finally determiined that each time the compressor was changed they added 8 oz of compressor oil so the system worked fine til the oil hit the expansion valve. They drained a 32 oz cup of oil out from the lowest point in the system. Worked fine after that.