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Hi, below is the iformation, thanks
Removal and Installation
Allow the engine (6007) to cool. Following all safety precautions and using a thick cloth, turn radiator cap slowly to the first stop. Step back while pressure is released. When the pressure has been released, tighten the radiator cap on the radiator.
Disconnect the heater water hoses (18472) from the heater core (18476) and plug the heater water hoses .
In the passenger compartment, remove the instrument panel (04320) .
Remove heater air plenum chamber (18471).
Remove heater core from heater air plenum chamber . For installation, follow removal procedures in reverse order.
CAUTION: Before performing any removal or installation on the Aerostar instrument panel, the battery to starter relay cable must be disconnected for a minimum of 60 seconds to discharge the air bag backup power supply.
NOTE: When the battery has been disconnected and reconnected, some abnormal drive symptoms may occur while the powertrain control module (PCM) (12A650) relearns its adaptive strategy. The vehicle may need to be driven 16 km (10 miles) or more to relearn the strategy.
Instrument Panel, Ranger, Explorer
Disconnect the battery ground cable(s).
Remove heater water hoses (18472) fromheater core (18476) and plug heater water hoses as described in this section.
Remove the heater plenum chamber case (18A484) .
Remove the remaining nuts which secure the heater air plenum chamber (18471) to the dash panel on the engine side of the panel.
In the passenger compartment, remove the instrument panel (04320)
Pull heater air plenum chamber rearward from the dash panel and remove from the vehicle