hi im new here for starters. I have a problem with my 2005 caravan, to start with we had to replace the coolant lines to the back due to corrosion, we had NO heat throughout the van. We found out that was caused by air in the lines. We bled the system, now we HAVE heat in the front ONLY. No heat in the back. the van has dual motor controls for front and rear, also a seperate control in the rear for the heat and blower. I tried turning BOTH rear fan controls on, still no heat . I tried each seperately , still only cold air. I can get away with JUST front heat but my kids dont appreciate it very much, lol. ANY help on what is going on and how to fix it would be greatly appreciated! I have looked all over online but you know how that goes! THANK YOU!!

 

Welcome to DF
The blend maybe the problem for no rear heat. You may need to remove the right rear qt panel and inspect the door operation.

 

could be a blend door/door actuator, blocked heater core or just air still trapped in there and still not enough coolant.

check under the car for the 2 heater lines that run to the rear (they run down passenger side and you want the two with the spring type clamps not the aluminum lines with the wrench fittings, thats A/C),

once you find em warm the van and find out if they are warm/hot to touch? if they r both warm then you know the heater cores ok, and likely a blend problem. if only one line under the car is warm then heater core may be blocked inside. if both are cold then no coolant is going down them and you have a blockage in the tubes somewhere.