Z Series E85 Z4 3.0Si (N52) ROADST
VS-23/Fischer
Baugruppe/Group: 64
64 01 07 (370)
weltweit
Datum/Date:
06/2007
Important information about vehicle climate control
E8x, E9x, E6x
Situation:
For reasons of topicality, we wish to draw your attention to the fact a visit to the workshop is
not always necessary in the event of a customer complaint regarding the vehicle climate
control.
Customers can often be satisfied at the workshop reception simply by changing the
customer's settings or by explaining certain behaviour characteristics (including noises) of
the air-conditioning system, so avoiding a visit to the workshop.
It does happen that the many different possible settings lead to customers selecting
unfavourable settings, so the customer should be informed about certain functions of the
air-conditioning system. To pre-empt complaints, it is therefore essential for the salesman
to inform the customer about these functions at the handover of the vehicle.
Procedure:
The following information about individual functions and potential complaints has been
drawn up for the purpose of information and should be passed on.
1. Noises
a)
Noises, permanent during air recirculation or intermittent when automatic air
recirculation is active (AUC):
The change in blower noise when air recirculation is active is caused by the system as
the airflow is deflected (flap movement). When automatic air recirculation is selected,
the noise automatically changes, depending on whether or not a pollutant has been
detected, and so on the position of the air recirculation flap.
The air recirculation flap also closes when the vehicle is reversing to that no exhaust
fumes can get into the vehicle interior. Depending on the quality of the air, the air
recirculation flap will sometimes be heard to move back to the fresh air setting after
about 30 seconds.
b)
Noises after switching off the engine
•
Flow noises from the engine compartment:
These noises could be caused by refrigerant flowing through the expansion valve
after the engine has been switched off. This condition depends on the ambient
conditions and tolerances in the refrigerant circuit, so it may occur to a greater or
lesser degree even on identical vehicles. This noise is no technical cause for
alarm.
•
Noises from the heating/air-conditioning case:
After switching off the engine and/or ignition, the stepper motors for the control
flaps in the heating/air-conditioning case may still move to its predefined rest
position. This process may take several minutes.
c)
Knocking noises when residual heat is active
On vehicles from E-series E53, E60, E61, E63, E64, E65, E66, E67, E70 and E83, a
slight tapping noise may be heard when the residual heat function is active. This is
caused by the control mechanism for the hot water feed (water valve) to the heat
exchanger and is a normal operating noise from the water valve.
2. Temperature and blower control
a)
Blower profiles
SI Important information about vehicle climate control E8x E9x E6x
BMW AG - TIS
16.02.2013 20:51
Issue status (12/2007) Valid only until next DVD is issued
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