High speed fan control disconnects every five to ten seconds?

RYDGOMEZ2

MEMBER
2014 DODGE GRAND CARAVAN
3.6L
V6
2WD
AUTOMATIC
230,000 MILES

The relay is new. I did an evac and recharge of my A/C system, so it’s fully charged. When I attach a 30-amp fuse to bypass the relay fan runs fine and does not blow fuse. When I reattached, the relay is latching and unlocking every 5 to 10 seconds nonstop causing my A/C system not to cool properly. What I want to know is what is commanding my relay to unlatch. Where would I look to next?

1 Reply

KEN L

MASTER CERTIFIED MECHANIC
42,949 POSTS

I have seen the A/C compressor clutch coil short out and cause this problem, to confirm let's try unplugging the compressor to see if the fan operation returns. Also, I have seen the TIPM go out and cause this issue as well. To be sure we should do a CAN scan, you can get a CAN scanner (Controller Area Network) which will work on most cars from Amazon.

Here is a video to show you how:

https://youtu.be/u-4syLc-ifQ

and

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

Here is one for about $99.00 if you need it:

https://amzn.to/3ZixY4v

Here is how to change out the TIPM in case you need it. The TIPM is easy to replace because it-self learns. Check out the images (below). Please let us know what happens.

Images (Click to make bigger)

High speed fan control disconnects every five to ten seconds?

1 Reply

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