Could it be anything but the heater core?
Bought a 2004 jeep overland v8 last year. Spent most of its time in Florida, I live
in Massachusetts. Lost all heat, getting codes 52 54 56. Removed dual blend
doors to replace, that are definitely damaged. Hoses from engine to firewall
hot. On way to auto parts place, once truck was up to temp, turned on heat, still
not working. Please tell me it's not the heater core!
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