[HotZ28]

Before you disconnect any battery cable, the ignition should be turned on and the A/C controller should be turned off; then you disconnect the negative cable first! Your system has a fault and it may be in a relearn mode, it may reset eventually, or it may not. If you have a fault that continues to be present, it will not reset. If the system detects no further faults, it will restore normal operation after about 50 ignition cycles.

You may have vacuum issues and you need to check the vacuum canister and vacuum lines from the intake manifold to the programmer. IIRC, the black line which goes to the inside (passenger side dash) has a coupling where it changes to a purple line. Check vacuum at this point also. If vacuum is present (with engine running) to the programmer, I would suspect that the vacuum block located at the programmer and going the vacuum actuators may have an obstruction. The multi-line vacuum block could be blocked, or you could have a vacuum leak going to the actuators. You can test the vacuum actuators, with a brake bleeder vacuum pump to see if they are operational. The rear defroster is a separate issue and may be related to the controller. Check voltage from the relay to the grid.