Heater core. High pressure cut-off switch

Heater core

WARNING: ON VEHICLES EQUIPPED WITH AIRBAGS, REFER TO GROUP 8M - PASSIVE RESTRAINT SYSTEMS BEFORE ATTEMPTING ANY STEERING WHEEL, STEERING COLUMN, OR INSTRUMENT PANEL COMPONENT DIAGNOSIS OR SERVICE. FAILURE TO TAKE THE PROPER PRECAUTIONS COULD RESULT IN ACCIDENTAL AIRBAG DEPLOYMENT AND POSSIBLE PERSONAL INJURY.

REMOVAL

(1) Remove the heater-A/C housing from the vehicle, and remove the housing cover. See Heater-A/C Housing in the Removal and Installation section of this group for the procedures.

(2) Lift the heater core out of the heater-A/C housing (Fig. 72).

Fig. 72 Heater Core Remove/Install

1 - HEATER-A/C HOUSING

2 - HEATER CORE

INSTALLATION

(1) Insert the heater core into the bottom of the heater-A/C housing.

(2) Reassemble and reinstall the heater-A/C housing in the vehicle. See Heater-A/C Housing in the Removal and Installation section of this group for the procedures.

High pressure cut-off switch

REMOVAL

(1) Disconnect and isolate the battery negative cable.

(2) Unplug the wire harness connector from the high pressure cut-off switch, which is mounted to a fitting on the discharge line between the compressor and the condenser inlet (Fig. 73).

(3) Unscrew the high pressure cut-off switch from the discharge line fitting.

(4) Remove the high pressure cut-off switch from the vehicle.

(5) Remove the O-ring seal from the discharge line fitting and discard.

INSTALLATION

(1) Lubricate a new O-ring seal with clean refrigerant oil and install it on the discharge line fitting.

Use only the specified O-rings as they are made of a special material for the R-134a system. Use only refrigerant oil of the type recommended for the compressor in the vehicle.

(2) Install and tighten the high pressure cut-off switch on the discharge line fitting.

(3) Plug the wire harness connector into the high pressure cut-off switch.

(4) Connect the battery negative cable.

Fig. 73 High Pressure Cut-Off Switch Remove/Install

1 - MANIFOLD

2 - LOW PRESSURE SERVICE PORT

3 - HIGH PRESSURE CUT-OFF SWITCH

4 - DISCHARGE LINE

5 - SUCTION LINE