Heater Performance: Notes
WARNING: This page is about a different car, the 2012 RAM Pickup and 2012 RAM Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
Before performing the following tests, refer to ENGINE COOLING SYSTEM for the procedures to check the engine coolant level and flow, engine coolant reserve/recovery system operation, accessory drive belt condition and tension, radiator air flow and the fan drive operation. Using a scan tool, check for any Diagnostic Trouble Codes (DTCs) in the A/C-heater control, Totally Integrated Power Module (TIPM), Powertrain Control Module (PCM) or Engine Control Module (ECM), depending on engine application. Repair as necessary. Refer to appropriate Electrical Diagnostic article. .