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On gas dryers, continuity can be checked at
the thermostat or from the normally open (N.O.)
terminal on the K501 relay to the gas valve. If
there's no continuity found, either the outlet or
inlet backup thermostat could be open as they
are in the same circuit.
Safety Thermostat
The safety thermostat is only found on the gas
dryer. It is located on the back of the blower
housing.
It opens at 190°F and closes at 151°F.
Outlet
Thermostat Diagnosing
The safety thermostat can be checked from the
common terminal of either the K504 or the K501
relays, or the J101 connector on the main board
to the line one side of the terminal block. If no
continuity is found, either the safety or the high
limit thermostat may be open.
Safety
Thermostat