2004 jeep liberty renegade. My heater quit working in the motor will only work on high now but only blows cold air what could possibly be wrong

More detail information would help. Is your blower motor working ? If you turn the A/C on, do you get cold air from the vents ? If the motor is working, then you might have a problem with your actuator. Might just be a blown fuse.

Jeep Liberty heater not blowing hot air Questions & Answers ...

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Jeep Liberty cars & trucks heater not blowing hot air questions and answers. Ask your Jeep heater ... My 2005 Jeep Liberty will not blow heat through ... properly.

jeep liberty 2002 heat problem/hvac box issue - YouTube

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Joffre richer-desroches. ... How To Install Replace Engine Coolant Thermostat and Housing 3.7L 2002 ...

What does your radiator fill tank look like? When is the last time you changed radiator fluid? If you have an oil leak into the radiator, combination produces a jelly like substance that may be what blocks the screen. You may need a radiator flush and refill.

if there is not even luke warm air coming from the heater it may be caused by the blend air door motor. on some of the jeeps they came out with a new upper heater housing that was a new design. I believe if your vehicle had this update the dealer would be able to check TSB's for the cause. other wise like I said, most likely the blend air door and/or motor

on all speeds, is it dead sounding or only no air flow???
wow no symptoms posted only this goose chase deal.

use the scan tool yet? see all DTC errors.
2008 cars can report most cause of lost power etc,
not scanning, invites expensive gue$$ing.!!

HVAC 101: (
gdoes the motor have 12vdc on high? at connector to it>?
on all speed's (now that is a KEY FACT there)

1. defeat air bag first or die , fiddling these parts.
2. do the HVAC calibration yet? per FSM.
3. scan it yet ,if not you will guess wrong. I promise,
4. i have to stop my online page ,is missing the wiring sections.

calibrate damper:
Use this procedure to ensure that the A/C-heater control is correctly calibrated to the blend door actuator. If the calibration is not correct, the heating-A/C system may experience a condition where full heating or cooling capabilities cannot be obtained.

Many steps can not be done with out a real jeep scan system.
sorry, cant.

oneor two things low coolant in radiator or poor flow through heater core . if motor is at normal running temp. and coolant full , then heater core needs flushed, check coolant in radiator first....

could be the thermostat if it was just stating to go bad,could also be a vacume problem not letting the door for the ac/heat close all the way for a few min.and if its really cold out like below 35,then its going to take longer to warm up,my jeep takes like around 20 min at idle to warm up.yours could be a case of over cooling in cold weather too ie(electric fans on before it warms up)that would be the thermostatic sensor.

Jeeps are notorious for having broken temperature control (Blend Air) doors. A malfunctioning Blend Air Door actuator probably caused it to break. The dash will have to be removed to replacethe door and the door actuator.

The problem that is causing your blower to only work on high is a part called a blower motor resistor. It works by taking the voltage that controls the blower and reducing it to slow down the motor so on other blower settings it wouldn't be blowing as much air as if it was on high. It seems to be a common part that goes bad in alot of different make and model vehicles. Not a very expensive part and quite simple to change for the do it yourselfer. If you replace it yourself than any local parts store would be able to tell you the exact location it is in. Good luck and i hope this helped you.

Sounds like defrost door on heater box is not work You need to get under dash and check controls on the box. Good luck