Ford H2MZ-18476-A
Heater Core

Service and repairs of the heater core need engineers to drain the engine coolant before starting work. You need to start by eliminating the instrument panel before moving to the right-side cowl vent screen. You should eliminate two screws and water shield before you detach heating tubes from the heater core. Vehicle owners must disconnect the remote climate control (RCC) module by removing its electrical connector as well as two nuts before disconnecting the vacuum harness and removing two screws when the model has Electronic Automatic Temperature Control (EATC). Any vehicle owner needs to first disconnect electrical connectors and remove three screws from the temperature blend door actuator while detaching its shield with two screws. The next step involves the removal of the temperature blend door assist spring after which the supplemental temperature blend lever shaft must be removed following tab depression to detach it from the supplemental blend door before rotating the supplemental blend door pivot shaft out of the metal link. Disconnect the metal link from the temperature blend door pivot shaft and proceed by using three screws to remove the heater core cover. Rotate the temperature blend door pivot shaft before extracting the cover along with its seal. Circular motion of the blend door pivot shaft will remove the heater core while following the reverse installation procedure. Complete installation requires cooling system refilling after finishing the instructions while also using plain water to lubricate the coolant hoses if needed.

Service and maintenance of the heater core begins with instrument panel removal. The heating process starts by draining radiator coolant until the heater core stays below the liquid level. Start by unscrewing the electricity connection of the Powertrain Control Module (PCM) through the disconnecting electrical connector while you also remove the heater water hoses from the heater core. First remove the metal cover by undoing its screws before disconnecting the wire harness connector of the A/C electronic blend door actuator and unfastening its screws. Next proceed to remove the A/C air intake damper assist spring after which operate the locking ramp to extract the A/C damper door shaft off from the air temperature control door shaft but ensure no bending damage to the fragile A/C damper door shaft. Use caution by avoiding bending of the brittle lever when removing the A/C evaporator case outlet door shaft. First remove screws from the heater core cover and subsequently extract the heater core cover seal until the heater core comes out. To install replace the components in the opposite order of removal while lubricating the coolant hoses with MERPOL(R) ESE-M99B144-B certified solution or using plain water as an alternative during installation.

You should start heater core repair with manual climate control by taking out the dashboard and right-side cowl vent screen. Begin by removing the screws followed by the water shield from the vehicle. The suitable hose pinching pliers should be used to clamp and disconnect heater hoses. Start by removing the screws after removing the shield then disconnect the electrical connector of the temperature blend door actuator and unfasten it with its screws. Unscrew and detach the temperature blend door assist spring and supplemental temperature blend lever shaft by pressing and removing the tab from the supplemental blend door before rotating and removing the supplemental blend door pivot shaft from the metal link to avoid bending any part of the lever. First remove the metal link from the temperature blend door pivot shaft before removing the heater core cover by unscrewing its screws while rotating the pivot shaft to take out the cover together with its seal. Last finish the heater core removal by turning the blend door pivot shaft until the core becomes reachable for extraction. The installation process requires reversing the disassembly instructions while treating the coolant hoses with coolant hose lubricant or plain water until refilling completes the cooling system.

A person must remove the instrument panel first to repair the heater core. The radiator should have its coolant drainage decreased until the heater core position becomes visible. Screw removal and disconnecting the electrical connector from the Powertrain Control Module (PCM) forms the first step before disconnecting the heater water hoses from the heater core. Proceed with removing screws which leads to revealing first the A/C electronic blend door actuator through disconnecting of the wire harness connector and unscrewing the attached fasteners. The technician must remove the A/C air intake flue damper assist spring before depressing the locking ramp to extract the A/C damper door shaft from the air temperature control door shaft and maintains the fragile A/C damper door shaft free from bending deformation. Detach the A/C evaporator case outlet door shaft while avoiding any damage that might occur to the lever which is similarly breakable. After removing the screws, proceed with removing the heater core cover and then the heater core cover seal until you pull out the heater core. Install the heater water hoses after reversing the removal sequence by using Rubber Suspension Insulator Lube E25Y-19553-A or another product that meets Ford specification ESF-M99B112-A.

Remove the screws and the metal cover, followed by the A/C electronic blend door actuator.

Remove the right-side cowl vent screen.

The right-side cowl vent screen and the screws securing the water shield.

Remove the instrument panel, followed by the right-side cowl vent screen.

Remove the instrument panel.

Carefully remove it without bending any part by depressing the tab and detaching it from the supplemental blend door, then rotate and remove the supplemental blend door pivot shaft from the metal link.