Whirlpool WED9150WW1 Mode D'emploi page 15

FOR SERVICE TECHNICIAN ONLY - DO NOT REMOVE OR DESTROY
5. Remove the white connector from the drive
motor switch. See figure 8.
Drive Motor
Switch
White
Connector
Figure 8. Remove white connector.
Main Winding: Lt. Blue Wire in Back
and Bare Copper Wire
Start
Winding:
Lt. Blue
Wire in
Back
and Bare
Copper
Wire
Lt. Blue
Belt Switch
Wires
Pulley
Figure 9. Main and start winding measure points
and checking the belt switch.
Figure 9a. Model 9051 motor assembly, front view.
Belt
Belt
Switch
or
Switch
(model
9051)
PAGE 15
6. Using figure 9/9a, check for the resistance
values of the motor's Main and Start winding coils
as shown in the following table:
NOTE: Main and Start winding coils must be
checked at the motor.
Resistance
Winding Ω
MAIN
3.0–4.0
START
2.4–3.4
If the resistance at the motor is correct, there
is an open circuit between the motor and machine
control electronics. Check for failed belt switch.
If the Start winding is in question and the
resistance is much greater than 4 , replace
the motor.
7. Check the belt switch by measuring resistance
between the two light blue wires, as shown in
figure 9/9a, while pushing up the belt switch pulley.
If the resistance reading goes from infinity
to a few ohms as pulley arm closes the switch,
belt switch is OK. If not, replace the belt switch.
If belt switch is OK and there is still an open
circuit, check and repair the wiring harness.
8. Door Switch problems can be uncovered by
following procedure under Diagnostic Test: Door
Switch, page 5; however, if this was not done,
the following can be done without applying power
to the dryer. Connect an ohmmeter across P8-3
(neutral, white wire) and P8-4 (door, tan wire).
With the door properly closed, the ohmmeter
should indicate a closed circuit (0–2 ).
If not, replace the door switch assembly.
TEST #3 Heater
This test is performed when either of the
following situations occur:
 Dryer does not heat
 Heat will not shut off
This test checks the components making up the
heating circuit. The following items are part of
this system:
Contact Points
of Measurement
Lt. blue wire in
back at pin 4 and
bare copper wire
on pin 5 of black
drive motor switch
Lt. blue wire in
back at pin 4 and
bare copper wire
on pin 3 of black
drive motor switch