Originally Posted by perryg114
The wall thermostat was manditory or an option?
That was something that came along later than our trailers. Actually earlier, too, with the Armgstrongs. The ones in the 1980s just used the controls built into the lower units. I don't know when that started and/or ended, perhaps someone can chime in on that. There are lower units available that have the simple thermostat and controls built in for replacement of the kind that you have.
Of course, upgrading to the wall units is an option, but more work. I didn't go down that path.