Jeep Compass radiator fan not activating when AC is on on Jeep Compass

Some Jeep Compass owners report experiencing issues with the radiator fan not activating when the AC is turned on. This problem may occur because the radiator fan is designed to operate only when necessary, which means it might not always run with the AC activated. Potential causes include malfunctions in the Engine Control Unit (ECU) or software, low coolant levels affecting temperature sensor readings, or a faulty fan motor. Additionally, a defective thermostatic switch may prevent the fan from turning on as it fails to detect the correct temperature levels. Troubleshooting steps often involve checking the electrical system, verifying signals from the AC or engine cooling system, and inspecting the radiator fan motor for issues. Specific error codes like P0480 and P0691 can indicate cooling fan system problems that may need further diagnosis. Owners are advised to ensure that relays, fuses, and wiring related to the radiator fan are in good condition to rule out electrical issues. It is recommended to seek assistance from a qualified mechanic or Jeep Certified Master Tech for effective diagnosis and resolution of these issues.