900 L4-1985cc 2.0L (1982)
Evaporator Core: Customer Interest
A/C - Evaporator Icing
FILE IN S.I. Man.
VOL. I
SEC. 8
PG. 84
Service Information
SUBJECT:
CORRECTING AC EVAPORATOR ICING ISSUE: 01/85-732 M80-85 SAAB 900 MODELS WITH AC
AC evaporator icing may occur if the location of the thermostatic switch capillary tube is incorrect or the switch has failed. New capillary tube locations
in the evaporators have been developed for 900 models from 1980 to 1985 that should keep the risk of icing to a minimum. (NOTE: M79-early M80
900's with "VIR" AC systems do not have this thermostatic switch.)
Should icing occur, refer to the capillary tube locations and troubleshooting described below.
M80-83 Models
1.
Withdraw the capillary tube and mark the tube with a wrap of tape 130 mm from the end of the tube. This insures that only the correct length (130
mm) will be inserted into the evaporator.
2.
Work the tube into the evaporator at the angle and location described in drawing 1. Check that the recirculation door moves freely.
3.
Test the system. Should icing still occur, replace the thermostatic switch (P/N 85-93-766) and again correctly locate the tube.
NOTE! Some 1981 models may have insulating foam instead of black "tar strip" insulation and may not use these procedures. Instead, refer to the
locations recommended in Service Manual Section 8 (p. 854-36).
