High Limit Thermostat; Inlet Control Thermistor - GE GHDS830EDWS Technical Service Manual

Inlet Control Thermistor

The inlet control thermistor is located on the
top right side of the inlet duct. The thermistor
monitors incoming air temperature and relays the
information to the control board.
The thermistor has a negative coeffi cient. As the
temperature increases, the thermistor's resistance
decreases.
Inlet control thermistor approximate resistance
values:
59.4 - 65.7K  at 69°F (20°C)
•
47.6 - 52.4K  at 77°F (25°C)
•
38.4 - 42K  at 86°F (30°C)
•
Operation of the inlet control thermistor can be
checked by using the inlet thermistor test in service
test mode. (See
Service Test Mode
Specifi c failures associated with the inlet control
thermistor can initiate error codes F01 and F03. (See
.)
Service Test Mode
To access the inlet control thermistor, it is necessary
to remove the rear bulkhead for front service or
back panel for rear service.
The thermostat is attached to the inlet duct with a
Phillips-head screw. A wire harness is connected to
the thermistor.
Note: Electric model safety and high limit
thermostats not located on the air duct.
Gas Model
Inlet Control Thermistor
On electric models, the high limit thermostat is
located near the back of the heater housing, on the
right side. On gas models, the high limit thermostat
is located on the top right side of the inlet duct,
between the inlet thermistor and the inlet safety
thermostat. The thermostat monitors incoming air
temperature.
If the thermostat reaches a temperature beyond its
maximum temperature rating, it will trip and disable
power to the heating elements (electric model) or
burner assembly (gas model).
The high limit thermostat opens at 300°F (149°C)
and will automatically reset at 270°F (132°C).
To access the high limit thermostat, it is necessary
to remove the drum (electric model). On gas models,
.)
remove the rear bulkhead for front service or back
panel for rear service.
The thermostat is attached to the heater housing or
inlet duct with a Phillips-head screw and a tab. Two
wires are connected to the thermostat.
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High Limit Thermostat

Electric Model
Gas Model
High Limit Thermostat
High Limit
Thermostat