Question about 2002 Jeep Liberty

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No hot air blowing

I've had a new themostat ,radiator and a flush and fill but my air still blows cool.Can you tell me why?

Posted by poochie boo on

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ross schmolzi

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Blend door may not be changing from cold to hot could be a vacuum or electrical problem

Posted on Dec 10, 2013

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brainyass

Brainyass Rabbit

  • 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

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onyeredson

Paul W

  • 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

Adam

  • 207 Answers

SOURCE: my 2003 jeep liberty's air conditioner blows hot

Probably, to be sure make sure the compressor is coming on. With the engine running turn on the ac and watch the rpms, they should drop for a second if the compressor is coming on. If so you just need to recharge, the refrigerant is R-134a, which you can get from your local parts store along with the kit needed to charge it. The kit will come with detailed instructions and is a pretty easy job.

Posted on Jun 10, 2011

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1 Answer

2002 jeep liberty


there is a blend door actuator under the dash that controls air flow.
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Your A/C has it's own little radiator that sits right in front of your engine's water-filled radiator. Heat from your engine radiator is prolly transferring itself into the other smaller radiator and over-whelming it. When any engine is running hot, it usually turns out to be a bad themostat, bad temp-sensors (that run your electric cooling fans on the radiator (or one (or both) radiator fans have died). I would start with the thermostat since it's the cheapest....

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LET IT COOL DOWN FIRST AND THEN REMOVE THE RADIATOR CAP AND YOU WILL SEE THAT IT IS LOW BECAUSE YOU HAD AN AIR POCKET IN THE SYSTEM ONCE YOU FILL IT BACK UP GIVE IT SOME THROTTLE AND YOU WILL SEE THAT THE LEVEL WILL GO DOWN WITH THE THROTTLE DOWN TOP IT OFF AND THAT SHOULD TAKE CARE OF IT

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Heater not blowing hot air


i suspect you have aur trapped in the engine. you need to purge the trapped air. leave radiator cap loose, park engine uphill on ramps to try and get radiator opening higher than top of engine.
fill radiator and coolant reservoir. start engine, warm up and wait for air to purge. may take a few attempts. be careful with hot coolant.

Jan 22, 2009 | 2002 Mercury Cougar

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