Camco Hott Rod RV/Camper 6 Gallon Water Heater Converter HR6 Atwood Suburban "10 degree outside thermostat set" Questions

...Outside temperature is 60 degrees Hott rod is 120Volt AC.Check voltage supply for undervoltage, or reversed polarity, or tripped breaker.Check that electric thermostat is set to 120 degrees.Rotate ...

...outside? Some contractor buys some knock off with an A. O. Smith label on it. I'm just very confused. After 25 years, I think replacement is probably best anyway. Just wondering if anybody has ideas ...