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biggysized 11-26-2013 01:23 PM

2007 overland won't heat up
Since it started getting cold I've noticed that my heat doesn't seem to be working. I will let my jeep warm up try the heat and nothing but cold air. Sometimes it works and sometimes it doesn't. I am leaning towards the thermostat.

I have been looking for any writeups on how to replace it in the diy section but can't find anything is it hard to do ? Any advice would be greatly appreciated on what you guys think it might be. I also thought it might be the heater core but I haven't had the slightest smell of coolant or any signs of it going. Thanks for reading .

yzjwk 11-26-2013 02:20 PM

If the temperature guage is moving shortly after startup and the engine reaches normal operating temperature , then your thermostat is most likely working and i would look at a blend door issue of some sort .

JeepN4KC 11-26-2013 02:22 PM

Sounds like the tstat is sticking.

Edit - I agree with yzjwk, though, if it's just your heat and the Jeep is running up to operating temp then I'd look at your heater core.

biggysized 11-26-2013 06:29 PM

I will drive it tonight and update you all about the temp gage in the dash.

Blue_Sassley 11-26-2013 06:39 PM

Also check coolant levels, no coolant in the engine equals bad.

biggysized 11-26-2013 08:32 PM

Okay guys so I drove it and Temp gauge seems to be normal on gauge only thing I noticed was the gauge was getting a little over than normal but when i stopped I heard the fan cut on and temp gauge went back to normal now another thing I noticed was I had heat on full blast and it was working normal but when I turned it to defrost and then turned it back to top vents as normal it was really cold and then a few seconds later it heated up again as normal.

I am very hesitant to switch it between defrost and top vents because I am starting to think it is a blend door issue hopefully not because im sure its pricey.

I am going to check coolant levels it has been a while since ive done that. Thanks for all the help guys.

biggysized 11-29-2013 08:07 PM

Topped off my coolant levels and problem solved thanks for the help guys

flexyxj 11-29-2013 09:13 PM

Check your waterpump and radiator. It would be wise to figure out where the coolant is going.....

biggysized 11-30-2013 09:24 AM

Good idea yea when I topped it off it has basically solves all my problems and it's been a while since I checked coolant levels probably in 15k miles I know bad on me I don't have vehicle a lot my wife drives it ima do a flush here soon check for any leaks while I'm at it

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