Cabin Heater Control Unit (HVAC Temperature Controller) ?
This spare part is needed to let the driver adjust cabin heat smoothly and keep the HVAC system working the way Mitsubishi designed it. It acts like the “brain” for the heater command, translating your knob/button input into a control signal that changes air temperature and heat level.
How it works ⚙️
When you select warmer or cooler air, the unit sends an electrical signal to the heater control circuit (and related actuators/resistors, depending on setup). This helps regulate coolant-heated airflow through the heater core and balances the air mix so the cabin reaches the temperature you want without constant readjustment.
Why replacing a faulty one matters ❄️
If the controller fails, you may lose accurate temperature control, get heat stuck on full hot, or have weak/no heat at all. Some vehicles may also show unstable fan behavior, intermittent operation, or controls that respond late. A broken unit can make winter driving uncomfortable, slow windshield defogging, and increase strain on the HVAC electrical system.
Common symptoms ?
- Temperature setting does nothing or changes randomly
- Heater stuck hot or stuck cold
- Intermittent HVAC response, especially over bumps
- Poor defrost/defog performance
Compatibility ✅
