Atwood WH-----Gas Only
Temp adjustments made via front dial (LOW--MED--HIGH) (Roughly 110*F to 140*F------MED is normal setting)
ECO (Energy Cut Off) T-stat is a probe that goes from back of gas valve into WH Tank---OPENS at 180*F and is a 'one shot' safety device. IF it OPENS you have to replace gas valve $$$$
Atwood WH ----Gas only DSI (Direct Spark Ignition)
Has 2 t-stats above burner tube
T-stat------Normal temp control OPENS 140*F
ECO (Energy Cut OFF)---High temp control OPENS 180*F (self resetting)
Normal T-stat can be replaced with one of these
OPTIONAL T-Stat that OPENS 130*F ------Atwood Part # 91470
OPTIONAL Adjustable T-Stat 110*F to 150*F -------Atwood Part # 93105