jeepman 87 Posted December 11, 2012 Share Posted December 11, 2012 Are all heater core boxes the same or are the ones with or without ac different Link to comment Share on other sites More sharing options...
flint54 Posted December 11, 2012 Share Posted December 11, 2012 For 88-90, and presumably others, the heater core is same with or without AC. The heater core housing is different since for AC it has to also hold the evaporator. HOUSING, Heater 8350 0957 w/o Air Cond. 8350 0959 w/Air Cond. Hope this helps. Link to comment Share on other sites More sharing options...
Gjeep Posted December 11, 2012 Share Posted December 11, 2012 Heater boxes ARE different with and without AC. I physically compared them side by side when I removed my NON-AC box and the non-AC box has a block-off wherer the AC box has vent holes. this was on an '89 MJ. Link to comment Share on other sites More sharing options...
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