Suburban uses 2 sets of t-stats One set for electric 120VAC----130*F/170*F One set for propane 12VDC------130*F/170*F
They are in outside compartment under rubber cover "Push To Reset" Top t-stat is Hi Temp and has a reset button (trips if temp goes high) Left side is for electric (black wires) Right side is for propane (red wires)