NHTSA ID Number: 10148375
Manufacturer Communication Number: 640613
TSB/Document Date: 2018-11-13
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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TSB/Document ID: 640613
Replacement Service Bulletin Number:
MFR Communication Date: 2014-08-01
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: EQUIPMENT:APPLIANCE:AIR CONDITIONER
MFR Component System:
MFR Component Subsystem:
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Page 1 of 6
SI B64 06 13
Body Equipment
August 2014
Technical Service
This Service Information bulletin supersedes SI B64 06 13 dated March 2014.
designates changes to this revision
SUBJECT
A/C Cooling: Intermittent Reduction of Air Flow
MODEL
F30 (3 Series Sedan)
F31 (3 Series Sports Wagon)
F32 (4 Series Coupe)
F34 (3 Series GranTurismo)
Produced from July 4, 2012 to September 2, 2013
SITUATION
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
PROCEDURE
Install a new evaporator temperature sensor adapter.
The fault can be reproduced under the following conditions:
Air-conditioning system switched on
Driving Experience switch NOT set to Eco Pro
Mainly at lower fan speeds
Temperature setting below 68°F (20°C)
Trip duration at least 30 minutes
Outside temperature above 68°F (20°C)
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Page 2 of 6
After parking the vehicle or switching off the air-conditioning system for at least 20 minutes, the symptom
disappears. However, this can occur again if the air-conditioning system is reactivated and a longer drive lasting at
least 30 minutes takes place.
Note: After stopping/parking the car or turning off the A/C, the ice will begin to melt off the evaporator and create
a puddle under the car from the A/C drains. After the ice melts, normal A/C operation will be restored.
1.
Remove the
passenger’s side
footwell cover
trim (the bottom
instrument panel
trim).
2. Remove both
screws at
connection (1).
Note: With the
knee airbag, also
remove both nuts
(1).
Tightening torque
is 5Nm.
Release the trim
panel (2) at
clamps (3). Feed
out the trim panel
(2) in area (A)
toward the
bottom.
Lower the trim
panel (2) slightly
and disconnect
the plug
connections
behind it.
Installation note:
Feed in the trim
panel (2) in area
(A) correctly
behind the center
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Page 3 of 6
console.
Clamps (3) must
not be damaged.
3. Disconnect the
plug connection
(2). Unclip the
evaporator
temperature
sensor (1) with
special tool 00 9
327 from the
heating and air
conditioning unit
(3), and remove.
Installation note:
Ensure the
evaporator
temperature
sensor (2) is
correctly seated.
4. The IHKA
housing (removed
for clarity) shown
is viewed from
the passenger’s
side. The circle
shows the
approximate
location of the
evaporator
temperature
sensor.
5. The close-up
picture shows the
exact location
(circle) of the
sensor opening.
The following
steps will be
performed from
the lower
passenger’s
footwell area at
the bottom of the
IHKA housing.
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Page 4 of 6
Note: As a
reference point,
the evaporator
temperature
sensor is located
just above the
white ribbed
rubber water
drain hose, when
viewed from
below.
6. Locate the
evaporator
temperature
sensor opening
(sensor removed
for clarity).
Check the gap
between the
sensor opening
and the
evaporator case.
If the sensor
opening contact
surface is slightly
angled as shown,
this housing is
NOT affected by
this repair
procedure. In this
case, proceed
with normal A/C
diagnostic
procedures.
If no gap exists
proceed to the
next step.
7. Check for a
marking on the
electrical
connector. If a
mark is seen or
NO gap exists,
the IHKA
housing must be
modified.
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Page 5 of 6
Do not replace
any parts. The
repair procedure
includes
installing a new
adapter to
correct the gap.
8. Insert the new
adapter firmly
into the sensor
opening, as
shown.
Note: The arrow
shows the slot in
the adapter that is
properly fitted
into the raised rib
of the housing.
9. Insert the
temperature
sensor through
the opening in the
adapter, and push
in firmly. Note:
The temperature
sensor is keyed
and will only fit
one way.
Installation note:
Ensure the
evaporator
temperature
sensor is correctly
seated.
Install all
removed parts in
the reverse order
of their removal.
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Page 6 of 6
PARTS INFORMATION
Part Number
Description
Quantity
64 11 9 350 495
Evaporator temperature sensor adapter
1
WARRANTY INFORMATION
Covered under the terms of the BMW
New Vehicle/SAV Limited Warranty.
Defect Code:
64 51 13 40 00
Labor Operation:
Labor Allowance:
Description:
64 99 000
4 FRUs
Work time to check IHKA housing and
install the sensor adapter (Main work)
2 FRUs
Work time to check IHKA housing and
install the sensor adapter (Plus work,
vehicle already in the workshop)
Refer to KSD2
Removing and installing evaporator
temperature sensor
or
64 99 000
and
64 11 943
Since the “work time” FRU allowance is specified for labor operation 64 99 000, a separate punch time is not
required.
[ Copyright ©2014 BMW of North America, Inc. ]
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