Your correct, the little dark colored end on the wires is the temperature sensor. You could try reseting the thermostat and see if it gets the proper temp after the reset because that is only a sensor, the brain is the thermostat for the whole system.
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Dick, Joyce, Diego, Picatso and Gustav
2017 3720 RL, and 2013 HC 343RL
Pullrite Hitch, IS, Disk Brakes, 3rd AC, Winegard Traveler, Bathroom door mod, Dometic 320, couch for desk swap, replaced chairs, sun screens, added awnings, etc.
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