A/T, Rear - Poor Performance

NUMBER: 86-B-45

GROUP: 1B-Air Conditioning

DATE: March, 1986
SUBJECT: REAR AIR CONDITIONING

MODELS: 1984-1985 C, K, G MODELS WITH REAR AIR CONDITIONING

Figure No. 1 - Rear Air Conditioning Expansion Valve:

The thermal expansion valve (Refer to Figure No. 1) used in rear air conditioning units, contains a small "funnel shaped" screen. If this screen becomes plugged, the rear air conditioning unit will not function properly.

Figure No. 2:

Harrison Radiator corrected this situation by installing the screen in the opposite direction from the original position. When viewed through the opening in the expansion valve fitting, the screen
should be positioned as it appears in Figure No. 2. This allows any debris in the system to collect around the base of the screen, while permitting the rear air to function properly. Vehicles which are found to have plugged filter screens should have the screen cleaned and the direction reversed so it is the same as the valve shown in Figure No. 2.