Econoline E550 V10-6.8L VIN S (2003)
Heater Core: Description and Operation
Auxiliary Climate Control
The auxiliary A/C system uses a rear-mounted heater core which operates in the same manner as the front mounted heater core.
Ford Workshop Service and Repair Manuals
Auxiliary Climate Control|Page 2783 >
< A/C - Heater Core Electrolysis/Leakage|Page 2780
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