[cfree3]

Not with the original SCS thermostat. However, the Coleman replacement for a two stage AC acts just like that. Both stages stay on until the set point is reached.

https://www.amazon.com/Coleman-6536A3351...ast_sto_dp

Do you have a wiring diagram on how to match up the old wires from SCS thermostat to the new coleman thermostat?
I found another tread with information and I think I have it wired right.  The SCS themostat had both compressor wired together however instead of seperate.  Maybe that was so both compressors would run until the setpoint.  Not sure.  So I wired them the same way to the new Coleman Thermostat. 

The reason we had to replace the thermostat was that we had a power surge from the generator which fried the thermostat and the relay on the AC board for the thermostat.  We had that relay fixed on the board and the rest of the board checked out ok.  The fuse had blown for the thermostat and when I replaced that the new thermostat lit up.  It would turn on the Aquahot and the AC fan if set to on but set on auto the compressors are not kicking on still.  I noticed that the fuse for the thermostat is wired to a black relay on the panel where the fuses are.  Please see attached picture.  Do you think this relay could be blow also.  If so, does anyone have a replacement part number for it?