Ram 2500 heating issue with blower motor functioning but still blowing cool air after thermostat and coolant replacement on Ram 2500

Some Ram 2500 owners report experiencing heating issues where the blower motor functions but only blows cool air, even after replacing the thermostat and coolant. These problems may stem from a clogged or leaking heater core, which is essential for heating the air entering the passenger compartment. Additionally, inadequate coolant circulation due to air pockets or blockages can hinder heat transfer, leading to insufficient heating performance. Some owners also find that malfunctioning blend doors and actuators can disrupt the mix of hot and cold air, resulting in cool air being blown despite a hot heater core. Flushing the heater core with a cleaning solution may help remove blockages, but proper circulation is vital for effectiveness. Furthermore, even after replacing the thermostat, some owners discover that a faulty thermostat can still affect temperature regulation. Lastly, it's crucial to check the electrical system, including connections, fuses, and relays, as electrical issues can also impact heating performance. Addressing these factors systematically can help resolve the heating issue effectively.