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Jeep wrangler 4 cylinder heat doesn't blow out

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  • Jeep Master
  • 20,706 Answers

Hi Lori.
No year stated. so I can NOT be accurate (only generic)
the engine must be hot first.
does the fan blow? if not fix that 2nd.
if it does blow, on high, can you direct air to all vents, defrost, try ReCirc?
first feel the top engine Front radiator hose. see hand fly? off ouch?, that is 180F+ temp. ok RAD is hot. (if not hot the engine thermostat is bad , stuck open) (under hood test this is.... read a book on safety first)
then I feel the 2 heater core hoses. same deal both must be hot.
if not? you have problems. (heater core clogged, etc)
next time post the year, I have a 2008 and know it well.
but they made wranglers from 1986 to now.

the fsm is here.read that. on heat

http://www.jeep4x4center.com/knowledge-base/index.htm?utm_source=cj#service

if all that, is Greek, then get it serviced as the operators guide directs you.

some cars old had a water valve., but no year, no joy.

Posted on Nov 18, 2014

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Posted on Jan 02, 2017

samson-1
  • 153 Answers

SOURCE: 98 jeep wrangler no heat

Try this disconnect the heater hoses from the heater core use a hose to backflush the core. Then reconnect and try again.

Posted on Oct 18, 2008

  • 30 Answers

SOURCE: 98 jeep wrangler 2.5L #4 misfire

check fuel for pressur and quantati to fuel rail posable fuel pump or regulator

Posted on Jun 09, 2009

herbalgarden
  • 344 Answers

SOURCE: '00 Jeep Wrangler with no heat and AC not blowing

Ok, if you are trying to use your AC and its not turning on, odds are your refrigerant levels are low, the system will not turn on when low fluid levels are present so the system doesnt burn up the compressor.

If your blower motor is not operating, you may have a fuse blown that needs to be replaced, or the control chip that plugs into the blower motor (for fan speed settings) has burned up (easy fix).

If your climate control is not throwing out heat when you change the settings to hot, you have a leaky vaccume line and the vaccume pressure is not strong enough to open or close (depending on setting) your blender box. Although typically when a vaccume line springs a leak you will have issues with your selector switch as well (defrost, vent, floor)

Also pay attention to your temp gauge to make sure the thermostat is operating properly, and the engine is not over heating ro getting excessivly hot! If it is, then you need to replace the thermostat ($8 part)
and go from there. Also you should check your heater core, if it gets clogged or has restricted coolant flow, your system wont have the heat it normally did (if any) when it worked properly.

This is just a quick summery of the area's you should be looking into for the problems you are having! thanks for using Fixya.com and good luck, I hope I have helped make resolving your problem alittle easier

Posted on Jan 08, 2010

Testimonial: "herbalgarden answered my question fully. No one-word answers here; he answered each aspect of the problem and offered multiple troubleshooting points"

  • 2 Answers

SOURCE: 95 Jeep Wrangler. Heater fan won't blow air.

qss

Posted on Jan 10, 2010

  • 1857 Answers

SOURCE: 95 Jeep Wrangler YJ...No heat, temp at about

It should be 200 degrees. If your running cold the only thing that regulates temp is the thermostat. If it is indeed 150 degrees thats why you have no heat.

If you replaced the water pump and the radiator for this condition then it was a waste of money. If you had a water pump or radiator problem it would overheat.

The fact that your blowing cold air tells me the that you really are 150 degrees or the heater core is plugged.

Posted on Mar 10, 2010

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