1990 XJ Heater Flush
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Joined: Feb 2021
Posts: 192
Likes: 8
From: S.E. KY
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0l
Hi all, I have no heat, heater control valve was removed by previous owner. I'm wondering if flushing the heater core (no leaks) will have any effect? Thanks.
Flushing back and forth can't hurt. Mine went from minimal heat to lots of heat. It gushed brown crap for several iterations of flushing back and forth before it ran clean.
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