F 150 4WD Pickup V8-5.4L SOHC VIN 3 (1999)
Heater Core Case: Service and Repair
REMOVAL
1. Remove the battery and the battery tray brackets.
2. Recover the refrigerant. See: Service and Repair/Refrigerant Recovery
3. Drain the cooling system. See: Engine, Cooling and Exhaust/Cooling System/Service and Repair
4. Remove the instrument panel. See: Body and Frame/Interior Moulding / Trim/Dashboard / Instrument Panel/Service and Repair
5. Disconnect the heater core hose couplings. See: Heater Hose/Service and Repair
6. Disconnect the refrigerant line spring lock couplings from the A/C evaporator core. See: Coupler HVAC/Service and Repair
7. Remove the plenum chamber nuts.
8. Disconnect the A/C vacuum hose from the A/C vacuum check valve.
