Maytag MEDB835DC W10240504 - Page 21

TEST #5: Moisture Sensor, TEST #5a: Adjusting Customer, Focused Dryness Level

Page 21 highlights

FOR SERVICE TECHNICIAN'S USE ONLY 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 "Service Test Mode", page 6, 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: 5. 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 the sensor harness.  If a small resistance is not measured, go to step 6. 6. Measure the resistance across each of the outermost contacts and the center terminal (ground connection). Part of Moisture System Harness/connection Electric Gas Dryer Dryer Metal sensor strips Machine control electronics NOTE: Refer to strip circuit on page 24 to diagnose moisture sensor. NOTE: Overdrying may be caused by a short circuit in the sensor system. 1. Unplug dryer or disconnect power. 2. Remove console to access the machine electronics. 3. Access the moisture sensor wires by sliding the top panel back and removing the front panel. Disconnect the 3-wire moisture sensor connector located below the door opening between the front panel and bulkhead. 4. Access the ACU and remove connector P13 from the circuit board. Check the wire harness for continuity between P13 and the moisture sensor connector.  If there is continuity, go to step 5.  If there is no continuity, replace the main harness.  If a resistance less than infinity is measured, replace the sensor harness. 7. If the moisture sensor diagnostic test passes, check the outlet thermistor: TEST #4a, page 18.  If the problem persists after replacing the moisture sensor and thermistor, consider adjusting the dryness level (see TEST #5a: Adjusting Customer-Focused Dryness Level). 8. If the preceding steps did not correct the problem, replace the ACU. TEST #5a: Adjusting CustomerFocused Dryness Level NOTE: If the customer complains about the clothes being less dry or more dry than desired and the moisture sensor passes TEST #5: Moisture Sensor, the total dry time can be lengthened or shortened by changing the Customer-Focused Dryness Level from "2" (standard auto cycle) to a "3" (15% more drying time), "4" (30% more drying time), "1" (15% less drying time), or "0" (30% less drying time) auto cycle. 1. In standby mode (dryer plugged in but not powered up), press and hold the DRYNESS or DRY LEVEL button for approximately 3 seconds. DO NOT REMOVE OR DESTROY PAGE 21

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PAGE 21
FOR SERVICE TECHNICIAN’S USE ONLY
DO NOT REMOVE OR DES
TROY
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 “Service Test Mode”,
page 6, 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 24
to diagnose moisture sensor.
NOTE:
Overdrying may be caused by a short
circuit in the sensor system.
1.
Unplug dryer or disconnect power.
2.
Remove console to access the machine
electronics.
3.
Access the moisture sensor wires by
sliding the top panel back and removing
the front panel. Disconnect the 3-wire
moisture sensor connector located below
the door opening between the front panel
and bulkhead.
4.
Access the ACU and remove connector
P13
from the circuit board. Check the wire
harness for continuity between P13 and the
moisture sensor connector.
If there is continuity, go to step 5.
If there is no continuity, replace the
main harness.
Part of Moisture System
Electric
Dryer
Gas
Dryer
Harness/connection
°
°
Metal sensor strips
°
°
Machine control electronics
°
°
5.
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 the sensor harness.
If a small resistance is not measured,
go to step 6.
6.
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.
7.
If the moisture sensor diagnostic test
passes, check the outlet thermistor: TEST
#4a, page 18.
If the problem persists after replacing the
moisture sensor and thermistor, consider
adjusting the dryness level (see TEST #5a:
Adjusting Customer-Focused Dryness Level).
8.
If the preceding steps did not correct the
problem, replace the ACU.
TEST #5a: Adjusting Customer-
Focused Dryness Level
NOTE:
If the customer complains about
the clothes being less dry or more dry than
desired and the moisture sensor passes TEST
#5: Moisture Sensor, the total dry time can
be lengthened or shortened by changing the
Customer-Focused Dryness Level from “
2
(standard auto cycle) to a “
3
” (15% more drying
time), “
4
” (30% more drying time), “
1
” (15%
less drying time), or “
0
” (30% less drying time)
auto cycle.
1.
In standby mode (dryer plugged in
but not powered up), press and hold the
DRYNESS
or
DRY LEVEL
button for
approximately 3 seconds.