A/C Evaporator - Freeze Up

Number: 24-13-99

Group: Heating & A/C

Date: July 2, 1999

SUBJECT:
A/C Evaporator Freeze Up

OVERVIEW:
This bulletin involves installing a revised low pressure cycling switch.

MODELS:

1997 - 1999 (TJ) Wrangler
1997 - 1999 (XJ) Cherokee

SYMPTOM/CONDITION:

Intermittent low A/C output due to reduced airflow through the evaporator or excessive condensation draining from the vehicle after the vehicle has been turned off due to evaporator freeze up. The system will operate normally in most conditions. The condition will only occur after extended periods of driving with the A/C system operating. The system will return to normal operation after the NC system has been turned off long enough for the ice on the evaporator to melt.

DIAGNOSIS:

If customers complain of this condition and no other NC system problems are found, perform the Repair Procedure.

PARTS REQUIRED:

1 05015871AA Low Pressure Cycling Switch (1997 Models)
1 05015872AA Low Pressure Cycling Switch (1998 - 1999 Models)

REPAIR PROCEDURE:
THIS REPAIR IS COMPATIBLE WITH DAIMLERCHRYSLER'S MOBILE SERVICE PROGRAM AND DOES NOT REQUIRE HOISTS OR OTHER FULL SERVICE FACILITY SPECIAL EQUIPMENT.

1. Disconnect and isolate the negative battery cable.

2. Disconnect the low-pressure cycling switch connector from the low pressure cycling switch located on accumulator.

3. Remove the switch from the accumulator and remove the 0-ring.

4. Lubricate the 0-ring with refrigerant oil and transfer it to the new switch. Install the new switch. The switch should be hand tightened to the accumulator fitting.

5. Connect the harness to the switch.

6. Connect the negative battery cable.

POLICY: Reimbursable within the provisions of the warranty.

TIME ALLOWANCE:

Labor Operation No: 24-35-35-90 0.2 Hrs.

FAILURE CODE: P8 - New Part