Question about Jeep Liberty

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Heat temp varies on 2002 Jeep Liberty

The heater on my 2002 Jeep Liberty works great when the Jeep is moving but it turns cold when I stop for a light. Then when I start moving, it heats up again. The temp gauge shows normal.

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  • Jeep Master
  • 20,706 Answers

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

Posted on May 03, 2014

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Posted on Jan 02, 2017

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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

  • 41 Answers

SOURCE: no heat when car not moving

Ok, judging from what you've said it sounds like a vacuum issue. The temperature controls are activated by vacuum which is produced by the engine. Look for small hoses that lead from the intake manifold to the firewall, check them and make sure they are not broken, disconnected, or leaking.  The vacuum directly controls the doors inside your dashboard which push the air to the heater core. Also make sure that the coolant hoses going to and from the firewall are hot.  If all that checks out, then the controls inside the car may have gone bad, or may have become disconnected from the vacuum supply, or the actuator door inside the dash is stuck or broken.

Posted on Dec 23, 2008

  • 1 Answer

SOURCE: heater starts to heat then afer a minute blow cold

water pump

Posted on Jan 18, 2009

  • 2920 Answers

SOURCE: 2004 GMC Sierra Heater does not heat on low RPM

check your coolant level on the radiator

Posted on Feb 03, 2009

mister_b_65
  • 74 Answers

SOURCE: heater on2002 Jeep liberty wont stay warm unless its moving



Check to see if the coolant level is low.






Posted on Dec 13, 2009

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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.

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No heat when car not moving


Ok, judging from what you've said it sounds like a vacuum issue. The temperature controls are activated by vacuum which is produced by the engine. Look for small hoses that lead from the intake manifold to the firewall, check them and make sure they are not broken, disconnected, or leaking.  The vacuum directly controls the doors inside your dashboard which push the air to the heater core. Also make sure that the coolant hoses going to and from the firewall are hot.  If all that checks out, then the controls inside the car may have gone bad, or may have become disconnected from the vacuum supply, or the actuator door inside the dash is stuck or broken.

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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.

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