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rpmdiag, Tech and Instructor
Category: Cadillac
Satisfied Customers: 8150
Experience:  Since 1975
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The compressor sometimes comes on and works great, then you

Customer Question

The compressor sometimes comes on and works great, then you cannot get the compressor to engage. The charge seems to be correct. could it be a clutch problem? or is it some sort of electrical problem?
JA: Has the clutch been slipping? Are you having any trouble shifting?
Customer: I am referring to the clutch that engages the air conditioner compressor.
JA: What is the model/year of your Cadillac?
Customer: 2006 DTS
JA: Are you hoping to fix this yourself? What have you tried so far?
Customer: I have had one dealer check it and one mechanic check it with no results.
JA: Anything else you think the mechanic should know?
Customer: we have replaced the entire engine component with a 2011 DTS including the AC compressor and recharged the system. That is when the problem began.
JA: OK. Got it. I'm sending you to a secure page on JustAnswer so you can place the $5 fully-refundable deposit now. While you're filling out that form, I'll tell the Cadillac Mechanic about your situation and then connect you two.
Submitted: 1 year ago.
Category: Cadillac
Expert:  rpmdiag replied 1 year ago.

Hi, I’m Ron and I can help you.
I have been in the auto repair business with my own shops since 1975 and also teach automotive repair. I am confident we can resolve your problem together. Please understand that I don't know your skill level. In most cases when you have a problem with the way the vehicle performs, specialized tooling is required to acquire computer data/information or engine testing results. We didn’t build these complicated vehicles; we just diagnose and fix them. Also understand that I can't see, smell, hear, or touch the vehicle either, so it may take a few replies to get to satisfactory results. I am also going to direct you with the fastest, easiest and most common things to check first. Please be patient and permit me to do what I do best.
I also try to give all of the information you may need, expecting a “positive rating” in return. I will also continue assisting you after you have rated me, if necessary. If there is any reason I cannot get a positive rating, please let me know why “in advance”, so I can go another direction for you. I am sorry you’re having this problem; I’ll help you through it.

It can be either actually. Easy enough to test for current flow to the compressor, and if it's good, then the clutch is defective requiring too much current to activate it all the time.

Thanks, Ron