Question about 2006 Jeep Commander

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2006 4.7 Jeep Commander Overheating

Replaced the thermostat and water pump, even though both seemed ok. Car still overheats.

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Can you see the cooling fans come on? When the engine gets to 212 degrees the fans should come on. To test the fans, with the engine running turn the A/C on high, the fans should come on .
The system also has a 212 switch that screws into the intake manifold. This is what turns on the fans with no A/C.
I hope this helps you.

Posted on Sep 06, 2009

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I would like to help you, hopefully there isn't any major problems I.e. blown head gasket. This vehicle is equipped with electric cooling fans... so the first thing we need to to check is that the fans are turning on. If they are not this is the cause of your overheating. If this is the case there are a couple of things you can check. fuses, fan relays and the obvious any wiring going to the fans not plugged in or bare shorting out causing your fuse to blow. I hope this helps and that it is not a blown head gasket

Posted on Sep 06, 2009

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Posted on Jan 02, 2017

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1 Answer

06 jeep commander replaced thermostat yesterday new water pump runs really hot at interstate speeds runs cool in town. Water backs up into recovery tank.and boils over fan will not engage at all.


can be many things, even bad head gasket.
but bad radiator,
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in 5min work.

or run the rad leak down test, to see head gaskets are good.
you never said
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