B150 1/2 Ton Van V6-239 3.9L (1989)
Heater Core: Service and Repair
W/ Standard Heater
Fig. 17 Heater Assembly. Less A/C
Less A/C
1. Disconnect battery ground cable and drain cooling system.
2. Disconnect heater core hoses.
3. Disconnect temperature control cable from heater core cover and blend air door crank.
4. Disconnect blower motor feed wire from resistor block located on distribution duct in cab.
5. Remove nuts retaining heater assembly to side cowl and nuts retaining heater assembly to dash panel, then remove heater assembly from vehicle.
6. Remove heater core cover, then remove the two heater core retaining screws and remove heater core.
7. Reverse procedure to install.
Fig. 18 Heater Assembly. With A/C
With A/C