I have a Tuscany 42GX which is similar with the same 400D Aquahot
The 42GX has two heat exchangers on two thermostats for the basement area
One towards the front and one towards the tank area
Cold weather camping requires the Diesel burner due to the exchangers required BTU to heat
Mine is a 2016 so it will be interesting to hear from others that have an AT since I don't have heat pads
On other units we have owned the heat pads were on breakers without thermostats
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