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May 1, 2015 Service bulletin

A/C Cooling: Intermittent Reduction of Air Flow

BMW technical service bulletin B640613 for 2012-2014 BMW 328I, 2012-2014 BMW 335I and 2014 BMW 328D and others.

Bulletin number
B640613
Component
Equipment: appliance: air conditioner
Summary
A/C Cooling: Intermittent Reduction of Air Flow. The customer may complain of reduced air flow when the air conditioning system is operated for an extended time, usually longer than one hour. The complaint can vary due to one or more of the following variables: ? High outside ambient temperature ? Too much humidity ? A/C temperature and fan settings set too low for too long Note: It is very difficult to duplicate this issue due the required outdoor weather conditions and length of driving time needed. CAUSE Evaporator starts to freeze up due to the position of the evaporator temperature sensor

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