A/C - High Pitched Hoot or Whistle With A/C ON
08-007February 6, 2008
Applies To:
2007 CR-V - ALL VINs Beginning with JHLR
2008 CR-V 2WD - From VIN JHLRE38..8C000001 thru JHLRE38..8C016154
2008 CR-V 4WD - From VIN JHLRE48..8C000001 thru JHLRE48..8C025123
A/C Whistles or Hoots
SYMPTOM
There is a high-pitched whistle or hoot from the A/C system when the the A/C compressor turns on while the vehicle is driven between 40 and 50 mph.
PROBABLE CAUSE
The refrigerant flow inside the expansion valve pipe assembly creates a whistle or hoot.
CORRECTIVE ACTION
Replace the expansion valve and pipe assembly.
PARTS INFORMATION
Expansion Valve and Pipe Assembly Kit:
P/N 06802-SWA-A00, H/C 8869141
WARRANTY CLAIM INFORMATION
In warranty: The normal warranty applies.
Operation Number: 6151B7
Flat Rate Time: 2.0 hours
Failed Part: P/N 80221-SWA-A01
H/C 8519076
Defect Code: 03214
Symptom Code: 04201
Skill Level: Repair Technician
Out of warranty:
Any repair performed after warranty expiration may be eligible for goodwill consideration by the District Parts and Service Manager or your Zone Office. You must request consideration, and get a decision, before starting work.
DIAGNOSIS
1. Test-drive the vehicle between 40 and 50 mph with the A/C off.
Do you hear a whisting or hooting sound?
Yes - Disregard this bulletin, and look for other causes of the noise.
No - Go to step 2.
2. While maintaining a speed of 40 to 50 mph, turn on the A/C.
Do you hear a whistling or hooting sound?
Yes - Go to REPAIR PROCEDURE.
No - The vehicle is OK at this time.
REPAIR PROCEDURE
1. Start the engine, turn the A/C on, and let the engine idle for 5 minutes.
2. Turn the ignition switch to LOCK (0), and then recover the refrigerant:
^ Refer to page 21-68 of the 2007-08 CR-V Service Manual, or
^ Online, enter keyword RECOVERY and select A/C Refrigerant Recovery from the list.
3. Remove the evaporator core by doing steps 1 thru 7 of the A/C evaporator core replacement procedure in the service manual:
^ Refer to page 21-56 of the service manual, or
^ Online, enter keyword CORE and select A/C Evaporator Core Replacement from the list.
4. Peel off the EPT sealer, and remove the original expansion valve and pipe assembly, including the 0-rings, by removing the two socket-head bolts.
5. Install the new expansion valve and pipe assembly. Make sure you use the new 0-rings included in the kit.
NOTE:
Apply refrigerant oil to the new 0-rings before installation.
6. Apply the new EPT sealer to the expansion valve and pipe assembly as shown.
7. Install the new 0-rings between the expansion valve and the A/C line joint side.
8. Replace the expansion valve cover seal with the new seal included in the kit.
9. Reinstall all of the remaining parts.
10. Charge the A/C system.
^ Refer to page 21-70 of the service manual, or
^ Online, enter keywords AC CHARGING and select A/C System Charging from the list.
11. Make sure there are no refrigerant leaks, and then confirm that the noise is gone by test-driving the vehicle.
Disclaimer