Cherokee 2WD L4-126 2.1L DSL Turbo VIN B FI (1986)
Evaporator Temperature Sensor / Switch: All Technical Service Bulletins
A/C Evaporator - Freeze-Up or Water Leak
OCTOBER 1986 001 108
1986 CHEROKEE/CWAGONEER
22E
HEATING AND AIR CONDITIONING
Attention: Workshop, Parts Department
EVAPORATOR FREEZE-UP OR WATER LEAK
Some 1986 Cherokee/Wagoneer models equipped with A/C may experience one or both of the following conditions.
Fig. 1
EVAPORATOR FREEZE-UP
If the evaporator is freezing up, it may be due to the A/C temperature control thermostat capillary tube not being in the heater-A/C housing. If the tube is
not completely inserted into the guide tube port, the thermostat will not receive the actual evaporator air temperature which will keep the clutch from
cycling.
The thermostat capillary tube must be in the guide tube port all the way to the red band on the tube (Fig. 1). If the tube is not fully inserted, service as
follows.
PROCEDURE
Disconnect the battery negative cable.
Remove the lower instrument panel.
CAUTION: It is extremely important that the capillary tube is not bent or kinked during installation. Hold the capillary tube, by hand, close to the guide
tube port. Insert only a small amount of the capillary tube at a time.
Fig. 2 - Guide Tube Gripped With Pliers
Grip the guide tube with pliers (Fig. 2) and very gently rock it up and down while pushing on the capillary tube. This will change the direction the guide
tube is pointing, allowing the capillary tube to slip around the evaporator tubes.
