A/C - Insufficient Cooling
90audi07Subject: Fresh air/recirculation servo mount, repairing
Model(s): 5000 1984-1988 m.y. 100/200 From 1989 m.y.
Group: 87
Number: 90-01
Date: November 30, 1990
insufficient A/C cooling can be the result of a broken fresh air/recirculation servo mount caused by a torn, distorted, or shifted recirculation air flap seal.
A misaligned seal exposes seal adhesive, and causes the recirculation flap to stick. The added force required to open the flap causes the servo mount to break.
Use the following procedure to repair a broken or cracked fresh air/recirculation servo mount.
Parts required
Description Part No. Quantity
Bracket 200 271 200 1
Screw, (4.2 X 13)
self-tapping N 013 966.12 2
Seal 433 271 263 A 1
CAUTION
Part numbers are for reference only. Always check with your Parts Department for latest parts information.
^ remove glove compartment
^ remove glove compartment liner, if equipped
^ remove passenger side lower shelf
^ remove screws (arrows) from recirculation air flap
^ disconnect spring and remove flap
^ inspect flap seal for distortion or rips and replace if damaged, Part No. 433 271 263 A
^ thoroughly clean and remove any adhesive from surface of flap
^ lubricate seal surface with silicone or petroleum jelly
^ unfasten water tray in plenum and lift tray partially up
^ reaching through plenum, disconnect fresh air/recirculation servo from fresh air flap
^ remove vacuum hose and remove fresh air/ recirculation servo
^ remove broken servo mount from servo
^ remove (cut) any remaining pieces of broken servo mount from housing
^ install bracket 1, Part No. 200 271 200 onto housing in same location as old mount
CAUTION
DO NOT over-tighten screws or permanent damage to the housing will result.
^ install self-tapping screws, Part No. N 013 966.12 or equivalent through holes in bracket (arrows) and fasten to housing
Note
A 1/4 inch drive air or electric powered ratchet with a hex shank phillips bit makes installing these screws easier.
^ inspect end of fresh air/recirculation servo (arrow) for cracks, replace servo if damaged
^ check servo diaphragm for leaks using hand vacuum pump US 8026
^ diaphragm must hold vacuum If NO
^ replace vacuum servo
^ install vacuum servo to new bracket and iock in place by turning servo 900 (1/4 turn)
^ connect vacuum hose to servo
^ connect end of vacuum servo to fresh air flap
^ re-fasten water tray in plenum
^ install recirculation air flap
^ seal and flap must be clean and free of seal adhesive
^ check A/C system for proper operation
^ fresh air/recirculation flaps must move (open and close) freely
^ install passenger side lower shelf
^ install glove compartment liner (if necessary) and glove compartment
Suggested Repair Time
Labor operation:
Quality
8760311 Diagnosis Repair Check
Install fresh
air/
recirculation
20 TU. 75 TU. 5 TU.
servo mounting bracket