My 2001 Durango just started to blow cold air in the rear. Can't figure out why. Any idea's??

 

Look on left fenderwell underhood back towards firewall to find your Aux. Coolant Pump. It runs when engine runs to send coolant toyour rear heater core. If hoses on both ends of pump are hot, it should be working.
If not, part is 90-120 bucks at stealership. Could also be the flapper in the rear that directs air between heater and AC core.

Good luck

 

Thanks I will give it a go. Do you know where the rear heater core is? The repair manual does not tell crap on this.

 

If you follow the lines back from the aux pump, they run along the passenger side all the way back to the rear corner. Look there from the bottom up, and you will see them. The core should be inside and to your right behind the interior as you look into the cargo hatch.

Don

 

Thanks for the help. The aux pump is hot on both sides. So I guess that is working. Where is the flapper in the rear that you spoke of. I would guess that would be it or there maybecrap in the rear heater core. I don't know.