Flame
Sensor
Thermal Fuse
Exhaust
Thermistor
High Limit Thermostat
Thermal Cut-Off
Figure 11.
Thermal components, viewed from front.
1. Unplug dryer or disconnect power.
2. Remove the front panel and drum assem-
bly to access the thermal components.
See Removing the Front Panel/Drum As-
sembly.
3. Perform TEST #4b. If the thermal fuse is
OK, go to step 4.
4. Perform TEST #4c. If the thermal cut-off
is OK, go to step 5.
5. Locate the high limit thermostat. See Fig-
ure 11. Measure the continuity through it
by connecting the meter probes on the
red wire and blue wire.
If there is an open circuit, replace the
high limit thermostat and thermal cut-
off.
Otherwise, go to step 6.
6. Perform TEST #4d. If this is OK, replace
the machine control electronics.
Heat will not shut off:
1. Unplug dryer or disconnect power.
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•
Dryer does not heat:
Locate the components using Figure 1 and
Figure 11.
2. Access the machine control electronics,
remove the P14 connector, then measure
the resistance between P14-3 (red-white
wire) and P14-6 (red-white wire) at the
connector. See Figure 17, for connector
location; and Accessing & Removing the
Electronic Assemblies.
If 5–15 k ohms are measured, replace
the machine control electronics.
If the resistance is greater than 20 k
ohms, replace the exhaust thermistor.
TEST #4a Exhaust Thermistor
The machine control electronics monitors
the exhaust temperature using the exhaust
thermistor, and cycles the heater relay on and
off to maintain the desired temperature.
Begin with an empty dryer and a clean lint
screen.
1. Plug in dryer or reconnect power.
2. Start the Timed Dry cycle.
3. If after 60 seconds,
F-22
or
F-23
flashes
in the display and the dryer shuts off, the
thermistor or wire harness is either open
or shorted.
Unplug dryer or disconnect power.
Check wire connections at the machine
control electronics and thermistor. See
Accessing & Removing the Electronic
Assemblies, and for thermistor loca-
tion see Figure 11.
If wire connections are good, remove
the two wires from the thermistor and
replace the thermistor. See Figure 11.
Plug in dryer or reconnect power.
4. If
F-22
or
F-23
does not flash in the dis-
play, the connections to the thermistor
are good. Therefore, check the exhaust
temperature value at any or all of the
temperature levels in question, using the
Timed Dry cycle, and the following pro-
cess:
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