Jerrys1990
OBS Enthusiast
Morning, over the winter I upgraded my '90 (broken) HVAC control panel to a good one from a 93-94 with the "MAX" button. The issue is, the actuators work, but the positions are not correct relative to the mode or temp selected, and the control face blinks. None of the actuators have been replaced, and I can hear the motors whirring. The symptoms are described here in this thread https://www.gmt400.com/threads/hvac-control-module-blinking-selector.66015/ . I don't have a service manual. Is there a calibration or reset procedure to follow? Or, could the actuators or feedback circuits be bad?