Installed an optima today and now the AC isn't blowing cold air. Give me a few suggestions for tomorrow. It is dark now and I am too tired to play anymore tonight. I took the old battery out yesterday but couldn't find an Optima until this evening. Does the time the battery has been disconnected from the car make a difference?

I tried doing a couple of searches, but I can't seem to find anything to lead me the right way.
Thanks in advance.

Do you have the automatic system? Try turning it on and off so it cycles. I don't have the memory setting package for seats and so on but doesn't that also set a preferred temperature? Also check to see that the outside temperature sensor reads correctly if you have the auto system.

See my reply to your same post in the General section.

Check your outside temperature reading. If it gets below a certain threshold (not sure what it is), the AC will not come on. I just replaced my ambient temperature sensor. I had to drive my car above 40 mph for a minute or two before the sensor accurately read the outside temperature.