Cadillac Repair: A/C Blows Hot Air codes, E46 & F47, ac system, coupe deville

Question
QUESTION: 1985 Coupe Deville, 4.1 Gas. I recently encounted an A/C problem, Replaced coolant sensor & serviced A/C pressure is good. Followed all the instructions from one your previous posts to an answer about switching back to Econo mode. Well it still blows hot air, compressor is running with no problems.

ANSWER: There is NO such code as E46 in 1985.

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QUESTION: I know there is no such code however please answer the question

Answer
There is NO WAY to answer the question until we find out WHY you are getting a code E47.

Are you POSITIVE that you have an 85 year vehicle  ?.

Did you replace the computer with the incorrect one ?.

In later years an E47 means that there is a communications problem between the ECM and BCM computers which can be causing you F47 code .

The F47 code means that your AC system is LOW on freon.

But this code may be a FALSE code being caused by the lack of communication between the 2 computers.