My van just overheated too. Both fans come on with the AC. Without the AC on heated up to 201 F, but neither fan came on. Also the ECM is not storing Freeze Frame Data. I read that the fans could be a grounding problem for the battery causing the ECM to not work correctly. Since I know the fans work I'll check that first. Does the AC use the same relay/s?
Start the car and turn on the AC to max. Do either of the fans run with the AC compressor engaged? Also, there is a temp sensor for the fan circuit but I don't know exactly where it is located on that vehicle.
SOURCE: My radiator cooling fans have no power and the 40 amp fan fuse is good, what's wrong?
There are many things that can cause your radiator fans to not get power. However, the most common cause is the fan control module. Some people call it a "fan control relay", (including many aftermarket parts retailers) but it is actually a solid state control module, not a relay.
Check for power in and out of the module. It is best if you have access to a scan tool that has system test capabilities so you can command the fans to turn on with the computer. Otherwise, you will have to get your engine really hot and see if the power is being sent from the control module to the fan motors.
The fan control module is located on the inside of the left frame rail (driver's side) just behind the radiator. You will have to get under the vehicle to see it. It looks like the picture below.
SOURCE: 2005 town & country van radiator fan runs after van sits
fuse/relay center underhood possibly corroded internally..lots of issues with these fuse blocks
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