Heat can cause electronic modules to fail, but I still say it's likely a sensor in the system.

Downloading the service manual (there is a link here, somewhere, I think in the SRT6 section) would be a good idea. It's a hard read, but the systems are explained somewhat well in the manual.

OH HERE IS SOMETHING ... there is an electric cam in the trunklid that locks the trunk closed during top operation, then it retracts when the top is done moving. Now, if the computer it TRYING to move the top, you can hear this cam lock. But also, the cam has a sensor(s) on it to tell the computer the status of the lock. Perhaps that is a sensor to look at!

I have removed my lock assembly as it was not retracting all the way, leaving the trunk locked. I have it tied up under the trim so that it can move (and tell the computer that the trunk is "locked").

So you have these criteria to meet before the top will move:

Car must be moving less than 9 mph.
Top must be released from windshield (sensor!)
Divider in trunk must be deployed (sensor!)
Electric lock in trunk must be activated (sensor!)

THere are also sensors that tell the system in what position all the cylinders are in, I suppose one could be defective, confusing the control module.