The three guys worked for about fifteen minutes. Actually, one guy worked and the others stood around as his support group. Too bad the support group didn't help because after the fifteen minutes they told me they needed a part and left. They returned ten minutes later, stood around, attached something to the wall and left again. The thermostat is not fixed.
While they were trying to fix this, I mentioned that the thermostat is the adjoining trailer was also not working. They told me they knew, but mine was in worse shape. Mine looked worse but not working is not working and that one does not work either.
I don't know if they returned to fix it later in the day. I left the room early (half day, parent teacher conferences). I bet if these guys worked for merit pay the thermostat would be fixed.