Originally Posted by bubbles
They are fixed thermostat controlled. May be able to buy a lower temp control thermostat. The 2 thermostats (both 12 volt propane and 120 volt replaceable heating element) are under the rubber cover you see in the access compartment. They can be changed without draining tank as they sense temperature of tank skin. Have not read of anyone changing them on this forum
X2 the temp setting is fixed. However you can contact the mfg, number in book should have been provided at purchase or look up on line. I did change mine a few years back, they offered about 5 temp ranges. Thermostat includes the overtemp trip also.