A/C Expansion Valve - Whistling Noise

* Bulletin No. 004/95
Issued 4/5/95
Revised 7/30/95

Category
U

Applicable Model/s
1994-95 626/MX6
with R134a A/C

Subject
EXPANSION VALVE WHISTLING NOISE

The "Applicable Models and Warranty Information" portions of this bulletin are revised. Replace the original bulletin with this revised copy.*

APPLICABLE MODELS/VINS

All 1994 - 95 626/MX-6 vehicles with R134a air conditioning systems and a VIN of 1YVGE****S5427357 and lower.

DESCRIPTION

An intermittent whistling noise may be heard from behind the glove box when the A/C compressor engages. The noise may occur after 15 minutes at idle, in park, with ambient temperatures above 64 degrees F. The noise may be caused by the expansion valve resonating.

The expansion valve has been modified to eliminate this concern.

Customers complaining of this noise should have the vehicle inspected and, if necessary, repaired.

REPAIR PROCEDURE

1. Verify the complaint.

^ If the noise is coming from the expansion valve, proceed to step 2.

^ If the noise is not coming from the expansion valve, refer to the workshop manual or the NVH manual for troubleshooting and repair procedures.

2. Replace the expansion valve according to the instructions in section U of the workshop manual.

WARNING:
FOLLOW ALL SAFETY AND REFRIGERANT RECOVERY PRECAUTIONS.

3. Evacuate the system according to the workshop manual instructions.

CAUTION:
Component failure may result if the system is not evacuated. Hold vacuum at 29 inches (740 mm Hg) for at least 15 minutes to ensure thorough evacuation.

4. Charge the A/C system and verify the repair.





PARTS INFORMATION

WARRANTY INFORMATION

(Applies To Verified Customer Complaints On Vehicles Covered Under Normal Warranty. Refer To The SRT Microfiche For Warranty Term Information.)

* Warranty Type: A
Symptom Code: 80
Damage Code: 9W
Part Number Main Cause: BC1M 61 J14
Quantity: 1
Operation Number: U0605XRX
Labor Hours: 0.8 Hrs.*