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6-8
Heat will not shut off:
1. Unplug dryer or disconnect power.
2. Use an ohmmeter, and touch the test
leads to electronic control board points
P2-5 (red/white wire) and P2-6 (black wire).
• If 6 to 7 kΩ are measured, replace the
electronic control board.
• If the resistance is much greater than
7 kΩ, replace the thermistor.
TEST #3a: THERMISTOR TEST
The electronic control board monitors the ex-
haust temperature using the 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. Set the dryer for the following configura-
tion:
• Door firmly closed.
• Press CONTROL ON.
• Press CYCLE END SIGNAL (Loud).
• Press HOLD TO START.
3. If after 60 seconds, E1 or E2 flashes in the
display and the dryer shuts off, the ther-
mistor or wire harness is either shorted or
open.
• Unplug dryer or disconnect power.
• Check the wire connections at the elec-
tronic control board and thermistor.
• If the wire connections are good, re-
move the two wires from the thermistor,
and replace the thermistor.
• Plug in dryer or reconnect power.
4. Electric Dryers Only:
a)Connect the ohmmeter test probes to
the red wires at the thermal cutoff and
the heater.
• If the resistance is approximately
10 Ω, proceed to step c.
• If an open circuit is detected, go to
step b.
b)Visually check the wire connections to
the thermal cutoff, the high-limit thermo-
stat, and the heater. If okay, check for
continuity (0 Ω), across each of the com-
ponents. Replace the one that is elec-
trically open.
c) If no open circuit is detected, measure
the resistance between P2-5 (red/white
wire) and P2-6 (black wire) at the elec-
tronic control board.
• If 6 to 7 kΩ are measured, replace
the electronic control board.
• If the resistance is less than 1 kΩ,
replace the thermistor.
Thermal Cut-Off
High Limit Thermostat
Thermal Fuse
Heater Element
Thermistor