Rio5 L4-1.6L (2006)
Housing Assembly HVAC: Service and Repair
HEATER UNIT
REPLACEMENT
1. Disconnect the negative (-) battery terminal.
2. Recover the refrigerant with a recovery/recycling/charging station.
3. When the engine is cool, drain the engine coolant from the radiator.
4. Remove the bolts (A) and the expansion valve (B) from the evaporator core.
Plug or cap the lines immediately after disconnecting them to avoid moisture and dust contamination.
5. Disconnect the inlet (C) and outlet (D) heater hoses from the heater unit.
CAUTION: Engine coolant will run out when the hoses are disconnected; drain it into a clean drip pan. Be sure not to let coolant spill on
electrical parts or painted surfaces. If any coolant spills, rinse it off immediately.
6. Remove the crash pad.
7. Remove the cowl cross bar assembly.
8. Disconnect the connectors from the temperature control actuator, the mode control actuator and the evaporator temperature sensor.
9. Remove the heater & blower unit after loosening 2 mounting bolts.
