A/C - Compressor Does Not Engage
90bmw20 Group 64 Heating and Air ConditioningBulletin Number 64 06 90 (3095)
Woodcliff Lake, NJ October 1990 Service Engineering
This Service Information Bulletin supersedes S.I. 64 06 90 (3095) dated August 1990. It incorporates a Warranty Status.
Please remove and discard S.I. 64 06 90 (3095) dated August 1990 from your S.I. binder.
SUBJECT: Air Conditioner Compressor Does Not Engage - Revised Repair Procedure
MODEL: E30 (1988 and earlier)
Situation: E30's equipped with "Compressor enable" microswitches as part of the heater control lever assembly may exhibit electrical failure of this assembly in a loss of voltage to the A/C compressor clutch.
If troubleshooting reveals an electrically failed switch assembly, do not replace the assembly.
Unplug black 2 pin connector from the assembly. Cut off the connector and strip sufficient insulation from the white and green/brown wires to allow you to join them by soldering. Insulate the connection with heat-shrink tubing.
Removal of the radio will allow access to these wires.
Important
Note: The function of the two lower control levers as regards A/C compressor clutch operation has been eliminated as a running production change during production of 1988 E30 models. This revised repair procedure will result in compressor clutch operation similar to later production vehicles.
Warranty
Information: Covered under the terms of the BMW 3 Year/36,000 Mile New Car Limited Warranty.
Defect code: 64 11 37 37 00
Labor operation: 00 50 250
Labor allowance: 5 FRU
Any questions regarding warranty coverage should discussed with your District Service Manager.