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Old 10-03-2011, 01:01 PM   #1
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heater problem

have a 2003 4.0 6cyl; no speeds and no heat....think I need a new core??

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Old 10-07-2011, 09:45 AM   #2
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ok, i know someone has to have an idea?!?

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Old 10-07-2011, 10:01 AM   #3

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Search for thermostat problems in the forum... That's what it was for me.
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Old 10-07-2011, 10:02 AM   #4
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No fan no air... You might have heat... Could be switch, fan motor, fuse issue, ground issue. I would start looking at electrical solutions before you go tearing into the heating system. Also after the jeep warms up, feel the two hoses going to the heater core, if they are warm then it could just be a cloged/slow heater core, but get your fan working first.
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