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How to Diagnose a bad A/C compressor ?

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Old 08-22-2014, 12:35 AM
boostme's Avatar
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How to Diagnose a bad A/C compressor ?

Hey guys, I've done a search and didn't come back up with anything and Chilton doesn't say anything. How can I properly diagnose that its bad. Last year I filled it with gas and still didnt work. So I let it be

The heat works excellent. I can hear the blend door moving (at least I think thats it). I came across a thread where someone mentions bypassing a relay that ensures the compressor is bad. I can rent some A/C tools from AutoZone but wanted some advice or some knowledge.

Replacing the compressor doesnt seem bad but don't want to buy unnecessary items.

Any help/experience to diagnose would be nice. Thanks
 
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Old 08-22-2014, 06:40 AM
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Reasons to replace a compressor

1. Leaking from shaft or body seal.
2. Catastrophic internal failure - bits and pieces of the internals contaminate much of the rest of system.
3. Mechanical seizure, often in conjunction with #2.
4. Insufficient pressure differential.

I don't see your symptom on that list. You need to do some actual troubleshooting instead of random wrenching.
 



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