Heater Issues 2007 Dodge Durango

[James Winner]

Eric,

Hi I’m new to your site but have been using your videos for a while now I love the way you explain and go through things. I have been having an issue with my heat not working in my Durango. First, it was just the rear and now it’s the front too. I replaced both heater cores and followed you advice on how to get air pockets out of the cooling system. I also checked the heater hoses from both heater cores and when the engine is running at operating temperature they are both warm the inout lines for the front and rear heater cores. I still only get heat when I’m pressing the gas in parkidle or driving and that’s just the front heat the rear heat doesn’t work at all. My next step is to check the actuators for the blend doors. Side note when I replaced the heater cores I did the evaporator coils as well the housing for the front evap coil cracked between the heater core and the evap coil but I closed it up as best as I could. I don’t know if it makes a difference but the rear ac housing is in tact so I don’t know. Any advise would be greatly appreciated.

Topic

[college man]

If heat comes out when you rev or drive and then goes away you still have air. The heater hoses
should be hot going in.

[Scott]

I had a very similar issue with my wife’s 2005 Altima ever since it was new in 2005. The dumbasses at the dealership never could figure it out, but Nissan finally did a tech service bulletin about air being trapped in the system. So in 2008 I finally put the car up on ramps to get the front end higher, and had my wife rev the engine to about 3k RPMs so I could burp the air out. I believe Eric did a video on how to do this. If not, I saw someone else do it on YouTube. The process included making a “bleeder bottle” out of a milk jug and some rubber hose. Attach the rubber hose in place of the hose that connects the radiator to the overflow reservoir, and hold the bottle up as high above the engine as possible while revving up the engine to at least 3k RPMs. But instead of building a bleeder bottle, I simply unbolted the reservoir and held it up high leaving the hose attached. So that was basically the bleeder bottle. It only required removing two bolts to lift up the bottle on the Altima, I’m not sure how the Durango is set up. It might be a lot easier to make a bleeder bottle.

[Wyr Twister]

I do not know if the heat controls are vacuum or electrical ?

Either way , I would check if there is a water valve that controls coolant flow to the heater cores ?

If not that , yes , I would check the blend doors .

Some of these functions , on older cars , were also operated by mechanical control cables .

God bless
Wyr

[Author]

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