GE GEH Series Service Manual page 71

Thermal Cutouts (TCO)
The thermal cutouts provide
additional safety from tank
overheating.
TCO #2 trips at 170°F and
breaks both L1 and L2.
TCO #1 trips at 160°F and
breaks the L1 circuit.
If either TCO opens, all heating
sources (upper element, lower
element and compressor) are
disabled. Both thermal cutouts
require a manual reset.
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