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HEATER AND AIR CONDITIONING 1A-59
Fig. 78—Evaporator Mounting (Corvette)
7. Check the system for proper operation.
Universal System
Follow the procedure outlined under " Evaporator" for
the Universal System.
Chevy II All-Weather System
Replacement of Valve Assembly
1. Purge the system of refrigerant and remove the
evaporator unit from the vehicle and the core from
the unit as described under "Evaporator."
2. Remove the expansion valve power element bulb and
the equalizing line connection from the low pressure
line.
3. Remove the low pressure and high pressure lines
from the valve. Remove the valve.
4. Install the new valve by connecting the low pressure,
high pressure and* equalizing line connections and
clamp the power element of the new valve to the low
pressure line.
5. Replace the core and evaporator as covered under
"Evaporator."
EVAPORATOR CONTROL VALVE (POA)
(Chevrolet, Chevelle, Comoro, Corvette)
No repairs or adjustments are available on the POA
valve. A malfunctioning valve must be replaced. Figures
80, 81, 82 and 83 illustrate valve installation on the above
vehicles.
THERMOSTATIC SWITCH OR BLOWER SWITCH
Universal System
Removal
1. Remove the screws attaching the cover plate to the
unit and pull the cover rearward.
2. (Fin sensing type) Remove the thermostatic capillary
tube from the evaporator core to permit access to
the back of the cover plate.
Fig. 79—Evaporator Core Removal (Corvette)
Fig. 80-P.O.A. Installation (Chevrolet)
CHEVROLET CHASSIS SERVICE MANUAL
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