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Heat varies on 2002 Jeep Liberty

My 2002 Jeep Liberty has a heater problem. It works great if the Jeep is moving but when I stop for a light, the heat turns cold. Then I start moving again, it heats again. Temp guage is normal.

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  • Jeep Master
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The most common fault is air pockets in the cooling system.
Is the radiator full of liquid coolant ?

Posted on Feb 15, 2014

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Posted on Jan 02, 2017

motor1258
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SOURCE: 2002 caravan, heater problems

That was a common complaint a few years back, due to the fact that the heater core is a little too much higher than the engine, which requires that extra push it gets when engine RPM's increase. One thing I did do on my Caravan was remove my hoses to the heater core, and use a small external pump with hoses to circulate C.L.R. through my core for a while, then let it sit with CLR in the core overnight.Next day I circulated it through again, both ways by reversing hoses, and then re-attached hoses, bled air out of system, and notice quite an improvement in heat at idle. Once cleaned out, the heater core allowed coolant flow through it better at idle. If your stumped by explanation, take it to an automotive shop, or a Rad shop, and get a quote on flushing that core out for you. I recommend the CLR, but it might be too time consuming for you , but a flush will probably show some noticeable improvement.

Posted on Nov 23, 2008

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Heater only blows hot air intermittently.


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Heat temp varies on 2002 Jeep Liberty


the heater fan is dead. blower.
check the heater fan fuse for BLOWN.

Feb 14, 2014 | Jeep Liberty Cars & Trucks

1 Answer

My 2002 jeep liberty 3.7L the heater stop blowing it was working on the number 4 setting now it dont work at all. no heat


this sounds like the heater motor resistor has gone bad and needs replacing.this controls the amount of voltage that goes to the blower motor to give you the different speeds.if it was the blower motor it wouldn`t have worked on #4 setting before stopping.this us located in the air box as it uses the air flow from the motor to help keep it from getting too hot,usually in the area of the motor and has about 5wires connected to it.

Oct 19, 2011 | 2002 Jeep Liberty

1 Answer

Jeep Liberty 2002 heater does not work when engine is ideling


Check anti-freeze level and thermostat first.If not, there's some electronic/computer/sensor ********! I once replaced a heater core in a friends car only to find out she was low on anti-freeze the whole time but not enough to send an alarm or blinking light. You can have flucuations in heat when engine exurts pressure wi'll driving and while idling.

Feb 16, 2010 | 2002 Jeep Liberty

1 Answer

Heater


the motor for the heat door is bad no switching from cold to hot

Jan 31, 2010 | 2002 Jeep Liberty

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2002 LIBERTY OVERHEATING:


do you have a "check engine" light on? A bad temp sensor would give a wrong reading. Do you get heat from your heater core? Also make sure you are getting a good flow from catalytic converter and muffler so you know they aren't plugged heating up engine temp. Also make sure all your heat shields are in tact. Are you using 50/50 mix or mostly water? Though in cold temps you normally want to use more antifreeze less water, I would try more water, less antifrezze.

Mar 11, 2009 | 2002 Jeep Liberty

2 Answers

2002 jeep liberty speedometer stopped working


My guess is that the speed sensor has gone out or the wires that go to it have been knocked off somehow.

Feb 02, 2009 | 2002 Jeep Liberty

1 Answer

02 Liberty having cold flashes!


1st check the coolant level. If it's low, it won't circulate thru heater core, and result is little or no heat. Let me know what u find, we can continue.

Dec 09, 2008 | 2002 Jeep Liberty

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