Climate control issues

MARTINISAM

MEMBER
2012 DODGE CARAVAN
143,000 MILES

I have 2 possibly unrelated issues:
1) The heat/air keeps coming on by itself - I turn it off and it comes back on a few minutes later.
2) When I first turn on the heat/air it takes several minutes for the fan to start blowing air, and it usually starts and stops several times before blowing steadily.

1 Reply

KEN L

MASTER CERTIFIED MECHANIC
47,643 POSTS

Yes, I have seen this problem before the TIPM module is out which is common with these cars but to be sure let's do a CAN scan which you can see how with this guide and video. I have also included how to replace the TIPM which is easy because it self initializes.

https://www.2carpros.com/articles/can-scan-controller-area-network-easy

Check out the diagrams (below). Let us know what happens and please upload pictures or videos of the problem.

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