gunrunnerjohn posted:Before you replace the $120 RCMC, consider trying the 691-RCVR-B01 TMCC receiver that sits on top of the RCMC, it's a much cheaper part. That's where the TMCC function resides.
The fan melting could be the result of the fan motor dying or the impeller binding, I had a similar failure recently.
The Radio (RCVR-B01) would not be related in this failure. It is just a radio, not a processor. You can pull it out and everything, sans TMCC ops, will still work.
The RCDR has over current protection on the elements, and also checks for element leads shorts to either chassis or 3Rd rail and shuts down if detected; although this is not foolproof. I suspect the Feedback Thermistor may have failed, and the Thermistor stops the Boosting of the Element when operating temp is reached. There is a timer to back up the Thermistor failure, and prevents Boosting run-away. Still at some point it all adds up and things can get pretty hot. There is an error code flash if the Thermistor fails.
