Heater Performance: Notes
WARNING: This page is about a different car, the 2014 RAM 3500 HD and 2014 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.
Before performing the following tests, see ENGINE COOLING SYSTEM - RAM PICKUP 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 Module, Body Control Module (BCM), Powertrain Control Module (PCM) or Engine Control Module (ECM), depending on engine application. Repair as necessary. Refer to DTC INDEX - RAM PICKUP .