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2010 Chrysler TnC wheelchair rear loading
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5 Posts
Discussion Starter · #1 ·
The rear heater is not pushing heat. How to find the reason?
What I did so far:

  1. The coolant is reaching the rear heater, I disconnected and quickly reconnected the flex hose at the rear to verify the lines had coolant.

  2. The front driver and passenger have lots of heat.

  3. I ran the car to normal temp, and set the rear heater control on the dash to hot. Then set the heat control on the overhead second row to hot.

  4. The ceiling vents in the rear still blow ambient temp air.
 

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2008 Town and Country 3.8L 175k mi
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309 Posts
You mentioned that the ceiling vents in the rear are blowing room temperature air. Does that mean that the other rear vents are blowing hot air? If that’s the case, a blend door or blend door actuator could be at fault. These components are located in the rear hvac box. It’s not terribly difficult to access, just takes some time to remove trim pieces and such.
 

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Super Moderator
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29,420 Posts
You have confirmed that the coolant is flowing and the blower is blowing air. Heat to the cabin is controlled by blend doors, there's no control valves on these vehicles. Coolant should always be flowing in the pipes.

So, as already mentioned - a blend door related problem.

 
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