Troubleshooting guide

PAGE 18
FOR SERVICE TECHNICIAN’S USE ONLY
DO NOT REMOVE OR DESTROY
IMPORTANT: To avoid damage to the gas burner
wire harness, ensure the harness is routed
exactly as it was prior to service.
10. Unplug dryer or disconnect power.
11. Reassemble all parts and panels.
12. Plug in dryer or reconnect power.
13. Perform steps under “Install Diagnostics”,
page 5, to verify repair.
TEST #5: Moisture Sensor
This test is performed when an automatic cycle
stops too soon, or runs much longer than expected.
NOTE: Dryer will shut down automatically
after 2½ hours.
The following items are part of this system:
NOTE: Refer to strip circuit on page 21
to diagnose moisture sensor.
1. Activate the Service Diagnostic Mode and
then select the User Interface/Control System
Test. See procedures on page 4.
2. Open the door. Using a wet cloth or one
finger, jointly touch both sensor strips.
If a repeating beep tone is heard and an
alphanumeric number is displayed on the
console, the moisture sensor passes the
test. Go to step 9.
If a beep tone is not heard, or a repeating
beep tone is heard before touching both
moisture strips, continue with step 3.
NOTE: Overdrying may be caused by a short
circuit in the sensor system.
3. Unplug dryer or disconnect power.
4. Remove top panel to access the machine
electronics.
5. Access the moisture sensor wires by
removing the console and front panel (see
page 22). Disconnect the 3-wire moisture
sensor connector located below the door
opening between the front panel and bulkhead.
6. Access the CCU and remove connector
P13 from the circuit board. Check the wire
Part of Moisture System
Electric
Dryer
Gas
Dryer
Harness/connection
��
Metal sensor strips
��
Machine control electronics
��
harness for continuity between P13 and the
moisture sensor connector.
If there is continuity, go to step 7.
If there is no continuity, replace the main
harness.
7. Measure the resistance across the
outermost contacts of the connector that
includes the two MOVs.
If a small resistance is measured, clean the
two metal moisture strips inside the drum.
If a small resistance is measured after
cleaning, replace sensor harness.
If a small resistance is not measured,
go to step 8.
8. Measure the resistance across each of the
outermost contacts and the center terminal
(ground connection).
If a resistance less than infinity is
measured, replace the sensor harness.
9. If the moisture sensor diagnostic test passes,
check the outlet thermistor: TEST #4a, page 15.
If the problem persists after replacing the
moisture sensor and thermistor, consider
adjusting the dryness level (see TEST #5a:
Adjusting Customer-Focused Dryness Level).
10. If the preceding steps did not correct the
problem, replace the CCU.
TEST #5a: Adjusting Customer-
Focused Dryness Level
NOTE: If the customer is complaining about the
clothes being damp and the moisture sensor
passes TEST #5: Moisture Sensor, step 3, the
total dry time can be lengthened by changing
the Customer-Focused Dryness Level from “1”
(standard auto cycle) to a “2” (15% more drying
time) or “3” (30% more drying time) auto cycle.
1. In standby mode (dryer plugged in but not
powered up), press and hold the DRYNESS
LEVEL button for approximately 3 seconds.