626 L4-1998 cc 2.0L SOHC FE (1987)
Ambient Temperature Sensor / Switch HVAC: All Technical Service Bulletins
A/C - Insufficient Cooling Performance
Category 16
Applicable Model/s 1986-1987 626
Subject
EVAPORATOR FREEZE-UP
Bulletin No.. 015/86
Issued
10/3/86
Revised
10/22/86
Evaporator
DESCRIPTION
Some reports have been received regarding the A/C evaporator on 626 vehicles which "freezes-up" and causes insufficient cooling performance. In most
cases, this condition is caused by a defective thermistor and/or a thermistor that is incorrectly installed in the evaporator. If a customer complains about
insufficient cooling performance, follow the procedures below in order to diagnose and repair evaporator freeze-up vehicles.
REPAIR PROCEDURES
1.
Diagnosis
If the following conditions occur on the vehicle, which may be caused by the evaporator freeze-up, proceed to Step 2.
^
Insufficient cooling from center louver.*
^
Compressor does not cycle properly. (Magnet clutch is engaged all the time.)
^
Air volume from vents is reduced noticeably.
The revised section is indicated by an asterisk. Please replace the original Service Bulletin with the revised bulletin.
