97 Dakota 3.9L auto. AC issue
Recently I put a full can of 134A refrigerant into my a/c system. Took the full can, no leakage, all seemed good. Prior to this the refrigerant reservoir had been empty for some time so there was no cooling if I selected a/c. Didn't really need it. This year with hotter temps coming I thought I might need it. So I decided to put some refrigerant back into it. It took the can nicely, got up to about 120psi while putting it in (followed manufacturers directions totally). As it was going in the compressor started to activate, this was a first for me (not orig owner). Afterwards I did (and do) have cooler a/c when selecting a/c.
However now when I select any other of the non a/c venting the compressors continues on, as if it thinks it is in the a/c mode. There are no fault codes coming up. So in a nutshell, I have a/c but I have the compressor working when it is not in a/c mode, which it never did prior to putting new refrigerant into the system. Any ideas what is causing this? Anything I can check or do to stop this from happening?