Question about 2002 Jeep Liberty
Heat turns on when moving but not when parked or idle
temperature of engine is running hot
Look for a vacuum leak. There are numerous vacuum hoses that lead from the intake manifold to the firewall. These hoses provide the vacuum necessary to switch the blower doors to the heat and vent position. It is most likely a loose or cracked hose because the vacuum pulled by the engine is higher when driving, and at its lowest when parked or neutral. This will make it work when driving but not when stopped. If all vacuum hoses in engine compartment are ok, you may have an internal vacuum leak inside the dash or from the controls, this will be harder to find without taking the dash apart. But, the common culprit is the vacuum hoses in the engine compartment since they are always always exposed to extreme cold or heat and rain or snow, which breaks them down over time. If the vacuum hoses even look a little suspect, start changing all of them so you kill any possibility of other problems, as the brake booster is also run on vacuum.
Posted on Dec 26, 2008
Sam S. Jain
please post your own post and not piggy back.
would you do that at the Doctors then accidentally get chemotherapy? or proctal exam, wrong? ouch....
mixing your facts (zero) with OP is so wrong....
now, you get your own DR and appointment.
1: country??? yah cars are not same in all countries. (laws, etc)
2: ;engine size and if gas or diesel?
3: is it an auto shift trans or manual stick??????
4: then post all symptoms, parked and driving in this case.
the OP is unclear as to
or engine overheating or both?
so please be clear there.
my guess is engine overheats but cab heater is dead.
but , who knows, and is 2008
Posted on Jan 19, 2017
Add water to the radiator check if the heater works on idle if so check for a water leak it could be a small water leak make sure to check every day
Posted on Dec 29, 2008
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Posted on Jan 02, 2017
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