Ford H2MZ-18476-AC
Heater Core

Service the heater core by beginning with drainage of the radiator followed by unclamping and extracting the heater water hoses. Begin by disconnecting the vacuum hose from the water control valve after which you should remove the instrument panel. The service of the A/C evaporator core housing begins after the powertrain control module (PCM) and its heat sink are extracted by minimizing the ground strap screw and heat sink. Start by unscrewing the heater air plenum nuts positioned against the dash panel on the engine side and then extract the heater core through the removal of screws holding the heater core cover to the air plenum before lifting off the cover. Installing the new heater core requires placing a new oval foam seal on the inlet and outlet tubes before proceeding with the reverse order of removal steps for assembly.

The procedure for heater core maintenance begins by setting your vehicle for operations removal. The first step requires removal of the A/C evaporator housing before proceeding to remove the instrument panel. The Powertrain Control Module (PCM) and its heat sink should be removed following the separation of both ground strap screws and the heat sink component. Perform a leak test on the heater core before you remove it when there are suspicions of leakage. After this stage, remove the four nuts from the engine area of the dash panel before setting the plenum chamber on the vehicle floor. Unscrew the screws of the heater core cover before extracting both the heater core and cover. The process of heater core installation requires the installation of new oval foam seals around inlet and outlet tubes followed by reversing the removal procedure.

A leaking heater core requires a leak test in order to remove it from the vehicle. Before starting the heater core pullout you must perform several preliminary steps such as removing both the A/C evaporator housing and the instrument panel. The powertrain control module (PCM) together with its heat sink should be removed as a single unit through the initial bolt removal of the ground strap followed by heat sink detachment. You should place the plenum chamber on the vehicle floor after removing the four nuts from their dashboard panel locations. Unscrew the heater core cover until it can be removed and at this point you should extract the heater core. It is imperative during installation to utilize a fresh oval foam seal which should be fitted around heater core inlet and outlet tubes. Afterwards follow the reverse order for installation.

Service of the heater core requires leak assessment before component removal. The procedure starts with removing both the evaporator core housing followed by the instrument panel. Start by taking out the PCM and its heat sink by first disconnecting the ground strap screw and detaching the heat sink unit separately. Install the plenum chamber on the vehicle floor by fastening the four engine-side dash panel nuts at 4 Nm(35 lb-in) torque. The installation starts by uninstalling the heater core cover through its screws followed by heater core removal. The installation process requires following the reverse order of removal steps with an additional step of adding new oval foam seal around the heater core inlet and outlet tubes.

A leak test should be conducted on the heater core before its removal for service and repair purposes. Service of the heater core should start with instrument panel removal and then proceed with evaporator core housing disassembly. First disconnect the heater hoses from the heater core while draining the radiator. The plenum chamber must be unscrewed first while removing the heater core through heater core cover screws and after removing heater core cover screws and plenum chamber nuts. Reverse the removal steps when installing the heater core while applying Ford Rubber Suspension Insulator Lube E25Y-19553-A or equivalent products that satisfy Ford specification ESF-M99B112-A. At the same time, put in a fresh oval foam seal near the heater core inlet and outlet tubes.

Take out the four nuts located on the engine side of the dash panel and position the plenum chamber on the vehicle floor.

Remove the evaporator core housing, followed by the instrument panel.

Remove the four nuts located on the engine side of the dash panel and position the plenum chamber on the vehicle floor.

Conduct a leak test before removal.

First, remove the ground strap screw and then the heat sink itself.

Remove the heater core cover by unscrewing it.

Begin by removing the evaporator core housing.

Remove the evaporator core housing, followed by the instrument panel.