ATWOOD uses 12V DC as control circuit for BOTH electric and propane.
12V DC goes to both electric/gas ON/OFF switches.
Then on separate wiring DC goes to circuit board for each heat source functions....but both use same t-stat/ECO circuits
Electric uses a DC Relay (located under protective cover where electric element is on backside of water heater tank)
Relay triggers the 120V AC to element
As suggested .......DC Relay stuck closed---120V AC goes to element BUT when temp is reached t-stat opens (140*F) and will close (110*F) to allow for reheat
which would continue with stuck relay
Suburban 'DEL' models use similar control circuit....only the DEL others use separate systems
2007 Jayco Designer Models used an Atwood XT 16 Model standard equipment.
XT Model uses a mixing valve and 10 gallon tank heated to 160*F (Equivalent to 16 gal capacity)
Same wring scheme used on 2004/newer Atwood Standard electric/gas models and XT Models
Is it time for your medication or mine?
2007 DODGE 3500 QC SRW 5.9L CTD In-Bed 'quiet gen'
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US NAVY------USS Decatur DDG31