OEM 2003 Lincoln LS Heater Core

2003 Lincoln LS Heater Core Parts Q&A

• Q: How to service and repair the heater core and evaporator core housing on 2003 Lincoln LS?

  A: The first step to repair heater core and evaporator core housing involves recovering refrigerant before draining part of the cooling system. The instrument panel requires removal while strictly following particular disassembly steps. Keep to the exact sequence of component removal that the images present for you. A vacuum leak test should be performed first to detect an evaporator core leak while a heater core leak test should precede removal. The installation of new O-ring seals treated with PAG oil becomes mandatory before you reattach any fittings which were disconnected from the A/C system. A new receiver drier should be installed only when either contamination from a defective A/C compressor or substantial receiver drier damage occurs. The installation method should start by doing the reverse of removal steps while applying the right amount of clean PAG oil to the refrigerant system. After that, restore the engine coolant level before performing an evacuation, leak test and charging of the refrigerant system.