Cadillac DeVille climate control display blank with erratic heater and A/C operation on Cadillac DeVille

Some Cadillac DeVille owners report experiencing a blank climate control display along with erratic heater and A/C operation. This issue may stem from a faulty climate control unit that requires repair or replacement of the display module. Additionally, electrical problems such as faulty relays, fuses, or issues with the Body Control Module (BCM) can contribute to the erratic behavior of the climate control systems. Some owners also encounter sensor malfunctions, which can cause the system to function improperly, necessitating the checking and replacement of faulty temperature sensors. Entering the diagnostic mode on the climate control panel may help identify specific issues, including relevant error codes. Furthermore, unresponsive physical controls on the climate control panel could indicate a separate problem with the control panel itself. If these steps do not resolve the issues, it is advisable for owners to seek assistance from a professional mechanic or dealership experienced with Cadillac DeVille climate control systems to ensure proper functioning.