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Post is vague but a few general things.

I would say yes. But generally there is a message that says AC off for engine protection.

At least a year would be helpful.

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Nice, clean, luxury= fine automobile

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Its a 95. I'm getting no message that AC is not working. The cluster display is showing dashes for the coolant temp. Their is a p015 trouble code which means open coolant temp sensor signal. The dash controls are all working. 

I just purchased this car at Mecum for $1500.00. It is from a company in California called Cinema vehicles that rents cars out for movie productions. Its actually in not that bad of shape. I fixed a few minor items but I  will need the air to work as it is located in Arizona. The suspension control is not working as it is throwing IO39 code which means no feedback from the electronic shocks but you cant feel much difference as it floats on air when it drives. so wont fix that due to cost.

This will not be my daily driver I only purchased because I like the body style. I am going to purchased the sensor, its only $16 and replace to see if this does not restore the feedback but just wondering if the PCM does not have no temp signal it would  not allow the AC to work. 

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I do not believe it turns off the AC, here is an OBD1 description of P015.

Check for A codes for your AC system


Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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