Question about 2006 Jeep Liberty Renegade

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How do you unclog the heater core on my jeep - 2006 Jeep Liberty Renegade

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Flushing may help but normally it is a new core

Posted on Apr 30, 2015

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Posted on Jan 02, 2017

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1 Answer

Unclog a heater core


The new cores are really thin and rather cheap,it's best to just replace it.
Messing around with flush and the like might get it to unclog a little but not like a new one.

Feb 23, 2012 | 2001 Hyundai Elantra

4 Answers

Changed thermostat and upper hose. found pin hole in hose, but this should still not cause no interior heat should it?


I had a camaro do the same thing and it was the heater core plugged with brown gook! I took the hoses off the heater core on both ends and put the hose in one of them until water came through the heater core. It took a little time but in became unclogged in a few. Brown water for a bit. Then reconnect and see if you get warm air for your heater. Hope this works.

Jan 22, 2011 | 1994 Jeep Grand Cherokee

1 Answer

Water leaking on passenger floor


Check, if it's coolant, going to be a leaking heater core, if it's water, a/c drain clog up, go under hood, passenger side fire wall, look for little hose coming out of fire wall, stick a pen in there to unclog.

Aug 16, 2010 | 2004 Jeep Grand Cherokee

1 Answer

Water is dripping inside the car under the passanger side seems to be coming from the water hose


the housing on the firewall encloses the heater and ac core. a drain is provided on the very bopttom. it will plug up causing the water to drain into the interior. you need to unclog the drain hole which is not easy to do. I recommend taking it to a jeep dealer

Feb 14, 2010 | 1997 Jeep Grand Cherokee

3 Answers

Last winter I had the heater core replaced in my 2002 Liberty shortly after having a new raditor put in. Now this winter the heater core is getting clogged. I don't want to keep paying the dealer to unclog...


Core should not become obstructed that fast unless the engine has severe internal rust. You can remove the heater hoses at the engine and flush through the core (in both directions) using a garden hose. Likely though you have a problem with a blend door or actuator which unfortunately requires heater box removal (big job)
Hope you are lucky with that one and it does not need that.

Dec 10, 2009 | 2002 Jeep Liberty

2 Answers

1998 jeep cherokeesport


Follow these steps:

Check coolant level, then start engine until it is warm and the thermostat opens. You will tell when it does when the needle on your temp gauge goes cold when it reaches around 180-200* and then goes back up. Now turn on your heater full blast and go to the engine compartment. You will see a heater valve located on the passenger side, next to the washer reservoir. It is a black thing with 4 heater hoses connected to it. Feel the hoses. When everything is working correctly it should be like this:

Hose going to waterpump will be hot
Hose going to (I think the thermostat housing) will be hot
2 Hoses going to heater core (mounted behind firewall) will be hot

1. If only 1 heater core hose is hot, heater core is clogged--
UNCLOG: remove 2 hoses going to heater core when engine is cool, hook water hose end to one of the sides and flush out gunk from heater core. Reconnect hose and you should be good.

2. If neither hose core hose is hot, heater control valve is bad or vacuum is bad--
Test Vacuum: remove vacuum line from heater control valve, you should feel the vacuum **** on it when pressed to your cheek and the heater control valve actuator should move when you unhook the vacuum line. If you have a good vacuum, it's probable the valve available at autozone part # 5941 for around $21.

To get heat while you wait to replace part, unhook silver arm on heater control valve that is hooked to the plunger. This will give you heat all of the time, but it is controlled by the bottom hot/cold switch on your heater control unit so you won't get hot in the cab. It will just circulate heat through the core.




Oct 25, 2008 | 1998 Jeep Cherokee

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