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Home >> BMW >> 2012 >> 740Li >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Climate Control - Overview >> IHKA (4 zone) >> System Air Flow >> Notes
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System Air Flow: Notes

The air flows through a flap between the fan motor and the climate control housing into the filter housing of the IHKA.

In the filter housing, the air is filtered by two combination filters (with activated charcoal) whether it is fresh air or recirculated air, it then flows on to the evaporator and heater core.

Depending on the IHKA settings and the in side and outside temperature, the air is initially cooled and dried by the evaporator and, if necessary, then re-heated by the heater core to deliver the requested outlet temperature.

Fig 1: Identifying F01/F02 Climate Control Unit
G06925543Courtesy of BMW OF NORTH AMERICA, INC.
INDEX EXPLANATION CHART

Index Explanation
1 F01/F02 climate control housing
2 Air inlet via flap
3 Connection for refrigerant circuit/expansion valve
4 Pipe connections for heater core
5 Right condensation drain from filter housing and climate control unit
6 Left condensation from climate control housing