ME733737
Heater Air By-Pass Damper
Mitsubishi FUSO®

The Heater Air By-Pass Damper, also known as part number ME733737, is a component of a truck's heating system that regulates the flow of hot air into the cabin. When the engine is cold, the damper blocks off the heater core and allows air to bypass it, preventing cold air from blowing into the cabin. As the engine warms up, the damper gradually opens to allow hot air to flow through the heater core and into the cabin. This ensures that the cabin remains at a comfortable temperature regardless of outside conditions. The Heater Air By-Pass Damper is an important part of a truck's heating system and should be checked regularly for proper operation.