A/C, Heater Check Valve - Freeze-Up

89Chrysler17

Models

1989 AA, AC, AG, AH, AJ, AK, AL, AN, AP, & AQ Bodies


Subject


Air Conditioning/ Heater Vacuum Control System Check Valve Freeze-Up


Index


HEATER AND AIR CONDITIONING

Date

November 13, 1989

No.


24-06-89

(C24-05-9)
P-4040
BODY CODE LEGEND

AA - SPIRIT/ACCLAIM AC - DYNASTY/NEW YORKER/LANDAU AG - DAYTONA AH - LANCER/LeBARON GTS (4-DOOR HATCHBACK) AJ - LeBARON (2-DOOR COUPE/CONVERTIBLE) AK - ARIES/RELIANT AL - OMNI/HORIZON AN - DODGE DAKOTA/DAKOTA SPORT (RWD, 4WD) AP - SHADOW/SUNDANCE AQ - CHRYSLER'S TC (MASERATI COUPE)


SYMPTOM CONDITION

During extreme cold ambient temperature (+ 10~F or less) conditions, a long delay (as much as 10 minutes) may occur when changing the air conditioning/heater mode switch from defrost to any other mode.

PARTS REQUIRED

1 Vacuum Control System Check Valve P/N 5264270

DIAGNOSIS

The delay in mode change from defrost to any other mode will most likely occur during ambient temperatures of + 10~F or less. The delay may be caused by an air conditioning/heater vacuum control system check valve freeze-up condition.

REPAIR PROCEDURE

When a vehicle owner encounters the SYMPTOM/CONDITION described above, replace the vacuum control system check valve assembly with Part Number 5264270, as listed under "PARTS REQUIRED." Refer to the following procedure.

FIGURE 1:

1. As illustrated in Figure 1, the vacuum control system check valve is located at the master cylinder power booster vacuum fitting.
2. Disconnect the check valve from the power booster vacuum fitting.

3. Disconnect the plastic vacuum line from the check valve, being careful not to damage the rubber fitting at the end of the vacuum line.

4. Insert the check valve into the vacuum line rubber fitting and connect to the power booster vacuum fitting.

5. Start engine and check the system vacuum leaks.


POLICY: Reimbursable within the provisions of the warranty

TIME ALLOWANCE:
Labor Operation No. 24-50-47-90 . . . . . . . . . . .0.2 Hrs.
(AA, AC, AG, AE, AJ, AK, AL, AN, AP)

24-50-47-90 . . . . . . . . . A/T (AQ)

FAILURE CODE: 08 - Blocked