No Heat...

Wrestler4Life · 11-17-2010, 05:15 PM

Alright guys...I've already checked the thermostat and the fluids. Everything is good on that end...This morning like every morning I started the jeep and let it warm up with the heater on...After about ten minutes I left for work...NO HEAT!!! I took it to my mechanic and he seems to think that its the temperature control? Any help how to change and/or any other suggestions would greatly be appreciated...

LibertyTC · 11-18-2010, 12:36 AM

Vacuum blend door actuator,vacuum problems or the actual blend door plastic rod can break, list goes on,cant find a link to the blend door if anyone knows where it is..post it.
Best thing to do is find the factory service manual for your year..which is what? and find as above.
Was there any recent service to the rad or etc? The rad and system needs to be flushed every 5 years.
How did you check the thermostat? When was the last time you had heat, or did it just stop?
Try bleeding the air out of the system, with reservoir cap off when cold for 15-20 minutes at idle, then re-apply reservoir cap any heat then,,.if so you got a leak somewhere.

**journeyjim** · 11-18-2010, 05:27 AM

The temp blend door is electric, if I remember what tjkj2002 said. Does the air flow from dash to floor change? I don't know if there is a fuze or not for this.

Wrestler4Life · 11-18-2010, 02:06 PM

Yeah, I had the radiator flushed last winter...January to be exact. But yeah, it just blows cold air no matter where I switch it to...This morning I put it on defrost/ combo and it put out warm air? Don't know if that helps or not? Anyways, keep the suggestions coming...I'll eventually figure it out?

d5332 · 11-19-2010, 04:58 AM

I had the same problem for a few months and these guys on here helped me figure it out.

You can do 2 things, pay to have it pressure tested OR check for fluid leaks. If you have antifreeze spots on the ground underneath your car then you have a tiny leak like I did.

It turned out that my radiator had a tiny tiny leak that was messing up the pressure system so I replaced the radiator. Dealear wanted $900 to replace the radiator, I still have the estimate for which I paid $180.00 for, it cost me $180.00 to get the Jeep back because I could not afford it.

I replaced the radiator when I finally found what seems to be a mechanic that is reasonable and trushworthy. He charged us less then $300 to replace the radiator with a brand new one.

The no heat issue begins with pressure issues. Dont scratch your head trying to figure it out. Take it in and have it pressure tested if you cant see any obvious leaks..

ryguy11 · 12-02-2010, 04:55 PM

I have a 2003 liberty, new water pump, new radiator, complete flush and fill, luke warm heat at best coming out passenger side, cold air on driver side.

Seems to be blend door actuator, only problem, I don't have $725 to have dealer fix it. Can anyone help with steps needed to replace the blend door? Heater treater doesn't have a kit for Liberty model. Does the entire dash need to be removed or can it be reached through temp. control panel? Help is appreciated.

tjkj2002 · 12-02-2010, 04:59 PM

Quote:

Originally Posted by ryguy11

I have a 2003 liberty, new water pump, new radiator, complete flush and fill, luke warm heat at best coming out passenger side, cold air on driver side.

Seems to be blend door actuator, only problem, I don't have $725 to have dealer fix it. Can anyone help with steps needed to replace the blend door? Heater treater doesn't have a kit for Liberty model. Does the entire dash need to be removed or can it be reached through temp. control panel? Help is appreciated.

The dash must come out,and then the whole HVAC box needs to be removed so that means a shop must evac the A/C system 1st,then after the repair recharge the A/C system.

BoosLibby · 01-18-2011, 08:02 PM

My buddy had the same problem .It turned out to be he dint have just enough coolent? it never over heated at all but he added about 1/2 gallon lol and BOOM! had heat