Not much heat coming out

210

Asked by Nov 04, 2014 at 06:59 PM about the 2007 Dodge Nitro SLT 4WD

Question type: Maintenance & Repair

I don't know what to do, I've tried everything I can think of.  I found and tested 3
actuator motors under the dash and the flaps they control.  The motors were strong
and I could not prevent them from turning with my hands. I turned the knobs they
connect to with my hands and you can see (as much as possible) the arms and gears
they are connected to turn from one side and back and you can hear the flaps inside
opening and closing.  I don't see any filters and the blower works fine.  I unplugged the
blower and listened to the actuators doing there thing.  Both of the heater core hoses
are hot but the outlet side is not as hot as the inlet. I disconnected the heater core
hoses and ran the water hose through the core full blast and it worked great, so that's
not plugged.  I started the car before hooking the hoses back up and the water pumps
working great.  There is a little heat out of the right side of the defrost but the middle
and drivers side are not at all hot.  It's just got to be something preventing the blown
air from fully crossing the heater core but I'm not sure what.  I see something
happening with the blend door and plastic gears toward the firewall. I guess I need a
picture of where that's supposed to be? Maybe the gears were kicked or slipped and
something is out of alignment?

6 Answers

210

I should also mention that the engine is in good operating temperature and has an adequate amount of antifreeze.

2 out of 2 people think this is helpful.
210

I did more hunting on the outerweb and found this from Roger about a week ago: "I have been trying to troubleshoot the "lack of heat" for a couple of months. The symptoms were lack of hot air particularly on the drivers side. Checked the anti freeze level, the actuators for the blend door etc , and flushed the heater core a couple of times. Heater core flushed easily with no sign of it being dirty. Dealer diagnosed it in no time. They said heater core and $1400 dollars later the heat works great. They explained that the heater core can and will plug in stages. So even thought you flush it, the tubes at the bottom can remain plugged. The lines are hot and circulating antifreeze through whatever tubes are not plugged. More and more get plugged and less surface of the heater core to make heat. I never realized this could happen to the heater core, always thought they would fail with a leak or plug up completely. Hope this helps. Roger" Thanks Roger! http://www.cargurus.com/Cars/Discussion-t25044_ds495279 I'm going to try flushing it with the hose again and flipping the hoses so they go in the opposite direction. Hopefully that will work for a little while. Then I'll buy a book and try to do it myself; thanks again! Bill

8 out of 8 people think this is helpful.
210

WOW, I don't think they made a Chilton of Haynes manual for this thing... GGGRRRR

1 out of 1 people think this is helpful.
210

OK, I pulsed the water hose on high for about 15-20 minutes through both sides of the heater core. Never saw any dirty junk for heard anything pop lose. Then I hooked the hoses up to it in reverse. Everything is working great now, awesome amounts of heat! I'll never understand why they designed the air flow passages to make so much awful noise when it's on high; you'd think they'd do better. I guess when you have a sexy girlfriend that likes mopars you have to learn these things. I'll get her driving a Ford one of these days! ;) The heater core will probably still need replaced sooner than later so I'll buy a Chilton for a jeep liberty of the same year as this dodge nitro. I'm pretty sure it's just a liberty with a dodge dress up kit. Thanks for all the help outerweb, I hope this is a blessing to someone else! Semper Fi, Bill

10 out of 10 people think this is helpful.
40

I've been having this EXACT same problem out of my 2008 Nitro. Thanks so much for voicing your experiences with this! Has helped point me in the right direction. I'll be going through flushing and reversing the hoses on my heater core this weekend. Will update on my experiences with this.

4 out of 4 people think this is helpful.
10

What worked for you ^

1 out of 1 people think this is helpful.

Your Answer

Add photo

Related Questions

Nitro

Looking for a Used Nitro in your area?

CarGurus has 2,225 nationwide Nitro listings starting at $3,495.

ZIP:

Search Dodge Nitro Questions

Dodge Nitro Experts

#1 cars4dummies
cars4dummies
Reputation 930
#2 Wutcha Gonnado Boutit
Wutcha Gonnado Boutit
Reputation 540
#3 Racer_X
Racer_X
Reputation 410
View All

Related Models For Sale

Used Jeep Liberty
265 Great Deals out of 8,138 listings starting at $995
Used Dodge Ram 1500
530 Great Deals out of 12,822 listings starting at $1,995
Used Dodge Charger
356 Great Deals out of 29,613 listings starting at $2,475
Used Jeep Grand Cherokee
844 Great Deals out of 68,670 listings starting at $864
Used Dodge Durango
300 Great Deals out of 24,109 listings starting at $1,500
Used Jeep Patriot
325 Great Deals out of 36,282 listings starting at $2,366
Used Ford Escape
1,110 Great Deals out of 90,469 listings starting at $1,295
Used Dodge Ram 2500
152 Great Deals out of 5,502 listings starting at $2,500
Used Chevrolet Equinox
1,260 Great Deals out of 65,891 listings starting at $1,600
Used Jeep Wrangler
393 Great Deals out of 19,082 listings starting at $3,000
Used Dodge Challenger
221 Great Deals out of 24,809 listings starting at $7,988
Used Ford Explorer
935 Great Deals out of 73,729 listings starting at $750
Used Dodge Avenger
160 Great Deals out of 5,522 listings starting at $1,295
Used Jeep Commander
69 Great Deals out of 1,948 listings starting at $2,495

Used Cars For Sale

2009 Dodge Nitro SLT 4WD For Sale
3 Great Deals out of 33 listings starting at $3,999
2008 Dodge Nitro SLT 4WD For Sale
99 listings starting at $5,331
2007 Dodge Nitro SLT 4WD For Sale
9 Great Deals out of 216 listings starting at $4,495