Atwood GC10A-4E is a combo (gas/electric) model that uses the SAME set of T-stats, Common DC for controls and same circuit board
You don't state/show what RV you have....Year/Model etc
If Water heater was an 'upgrade' from an older version then repair shop didn't wire it correctly ....Using DC for both gas/electric on/off switches and DC to relay that when it closes allows 120VAC to element
Normal t-stat is factory pre-set to 140*F...gas and electric
ECO (Energy Cut Off) ---ie: High Temp t-stat is factory pre-set for 180*F
If ECO opens then ALL DC is shut down...no more heating and RED Fault Light is triggered so Owner has a visual indication of problem
Overheating and NO RED Fault Light
Could be because the T-stat is not being held TIGHT against tank wall
Air space can allow for higher temps before t-stat opens
Water coming out of T&P Relief Valve
T&P POPS Open at 210*F/150 psi
'Weeping' can occur due to loss of Air Pocket in top of tank above Hot outlet dip tube
Water SWELLS when heated......air can be compressed to control pressure increases. Water can NOT be compressed so w/o air pocket pressure will increase enough to cause weeping/dripping from T&P
