OEM 2005 Lincoln Aviator Heater Core

2005 Lincoln Aviator Heater Core Parts Q&A

• Q: How to service and repair the auxiliary heater core and evaporator core housing on 2005 Lincoln Aviator?

  A: The first step of auxiliary heater core and evaporator core housing repair begins with a neutral-gear-positioned car on a hoist. First pull out the refrigerant vapors from the system while draining the engine coolant. First detach the auxiliary climate control housing from the headliner duct and remove the LH quarter trim panel. The two A/C fittings need removal using nuts while discarding O-ring seals before tightening new fittings to 8 Nm torque setting (71 lb-in) during installation. Proceed to disconnect heater hoses so coolant draining from the auxiliary heater core will remain outside the passenger compartment area. During reinstallation secure the two floorpan bracket nuts by tightening them to 8 Nm (71 lb-in). The secondary housing requires two bolts with nut removal but users should torque them to 7 Nm (62 lb-in) during installation. Disconnect the electrical connector from the auxiliary harness after which you can remove the auxiliary climate control housing. The reinstallation process consists of following removal reversals while cleaning and lubricating the coolant hoses with plain water whenever needed along with fresh O-ring seal installation using clean mineral oil followed by correct PAG Refrigerant Compressor Oil F7AZ-19589-DA (Motorcraft YN-12-C) lubrication of the refrigerant system. Complete the work by filling the cooling system of the engine then evacuate and test for leaks before charging the refrigerant system.