Question about 2004 Jeep Liberty

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Car blows cold air when on heat

Air is not hot when in blows out, flushed it, changed radiator and thermostat still cold

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You may have a plugged heater core. You can verify by getting vehicle to running temp and turn heat on. Get under hood an dfeel both the top and bottom heater core hoses. They should both be the same temperature. If one is hotter than the other, you have a plugged heater core. Otherwise, if they both feel the same, you probably have a blend door issue.

Posted on Feb 19, 2015

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  • 7 Answers

Check heater core.

Posted on May 03, 2014

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Posted on Jan 02, 2017

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SOURCE: heater not blowing hot air

sounds like a blend door problem... find lever to blend door disconnect it move lever back and forth and see if it changes anything...

Posted on Aug 01, 2009

  • 36 Answers

SOURCE: heating problem

If you changed the thermostat yourself and have noted that the lower radiator hose is cooler than the upper radiator hose, you may have installed the thermostat incorrectly or have purchased a faulty thermostat. A lower radiator hose that does not get hot (or as hot as the upper radiator hose) is a direct indication of a faulty thermostat. Please vote for this solution if you found this to be helpful. Thanks,

Posted on Jun 01, 2009

onyeredson
  • 404 Answers

SOURCE: The heat in my 1992 Jeep Wangler is not working.

Hi!
It appears we have an Air lock scenario and you will need to perform a system Bleed.
Park the vehicle on level ground, when cold remove coolant filler cap, start engine and leave to idle, turn heater on full and blower to max. When engine reaches operating temperature watch and listen near coolant filler, keep clear as gurgling and hopefully a boil over should occur. Top up with very warm coolant and wait as it may do it again.
Check for heat inside vehicle if warm replace coolant cap but keep an eye on temperature gauge as the ~Air lock may have moved on from heater matrix/core so proceedure needs to be carried out again from COLD.
If persistent boil ups/over attention must made in the cylinder head
or gasket area, or possibly water pump?
Please press the Blue button to appraise my FREE Efforts, Thank You!
Paul 'W' U.K.

Posted on Feb 05, 2009

brainyass
  • 242 Answers

SOURCE: heater only blows warm air.

The hoses from your heater core should be very hot to the touch. Check the hoses going to the core from the water pump. It should be very hot. The return hose should also be very hot. Now check the hoses going to the core. If they are not the same temp, then your heater control valve is not working correctly or the vacuum is not working. At any rate, locate the vacuum line going to the heater valve. Remove the silver bar on the valve from the plastic plunger arm. You will have heat all the time now if it was only a vacuum problem. You can fix it later when it's warmer out. BTW a 200* thermostat will make your heater even hotter.

Posted on Nov 21, 2008

  • 2 Answers

SOURCE: 1992 Jeep Wrangler heater not blowing hot air

How often has the coolant been changed? My only guess is that it hasn't and the hoses and the heater core are plugged up with goo and a flush is needed

Posted on Dec 26, 2008

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