Q7 Quattro V8-4.2L (BAR) (2008)
Refrigerant: Customer Interest
A/C - Does Not Cool Sufficiently
87 Climate system is not cooling as desired
87 10 07
2012886/5
September 2, 2010
Supersedes Technical Service Bulletin Group 87 number 10-04 dated August 6, 2010 for reasons listed below.
AFFECTED VEHICLES
CONDITION
The A/C system is not cooling as desired in hot weather areas.
TECHNICAL BACKGROUND
The following are suggestions to achieve maximum cooling efficiency in hot weather areas.
PRODUCTION SOLUTION
Not applicable.
SERVICE
1. Ensure that the scale on your R-134 A/C service tool is properly calibrated.
2. Discharge the A/C system as described in the ElsaWeb Repair Manual and measure the amount of refrigerant removed from the vehicle.
3. Refill the A/C system with the specified amount of refrigerant. Include dye for leak testing. (Ensure proper amount of refrigerant oil.)
Refrigerant capacity in grams
^
2 Zone 700 +/- 50 grams
^
4 Zone 1050 +/- 50 grams
4. If the incorrect amount of refrigerant is measured then take the appropriate steps to identify the leak in the system. Check service connections, A/C
line joints, TXV connection, etc to ensure any small leaks are identified and repaired.
5. If the correct amount of refrigerant is measured, perform the A/C system cooling performance, checking test outlined in the ElsaWeb Repair Manual
for the Audi Q7 front and rear A/C system.
6. Verify that the front and rear climate systems are operating within the specified operating range.