My 2003 jeep heat blows cold air?

Have you checked the thermostat and the heater core?

hi Ondelea.
see if this link helps you out.
2003 Jeep Liberty heat problem it blows cold air Google Search

Well this is different since most questions now are about no heat.
If one ac line is cold and the other is warm, I would suspect a blend door under the dash is not working. The blend doors direct air thru the heater core and the vents.

Water level perhaps. When you hit the accelerator the water volume increases. Check your water level and make sure that your thermostat is opening and closing properly. Water level I'm thinking

possibly some other part affecting the blend door if you feel ac air or no heat

it could be many things, maybe compressor heats up and shuts down, or cooling fans are cooling condensor or expansion valve is bad, a good tech will be able to diagnose this,

sounds like the blend door motro may be bad, this motor is screwed to heater box, there are a few of these motors one for pass/side for hot/cold air then one to control position of air like defrost or vent or floor, then the driverside cold/hot air, i think this motor is on driverside part of heater box, to make sure locate each motor while moving all controls until you spot the one that doesnt move, then remove it and move door manualy to see if you get heat, then replace that motor, hope this helps,

Check the coolant level, sounds like you may be slightly low....Be sure heater is on high when filling the system....Look for any air bleeds...

Hi i'm ryan, is it blowing cold air, or just won't come on at all? If its blowing cold air try checking the antifreeze level, low levels will cause it to blow cold air. If it is just not comming on at all, try checking the fuse for the heater.

go to wjjeeps.com, there you will find several solutions and simularities. hope this helps