Maytag MDG25PN Service Manual page 102

1. Check the belt switch. Remove the drum
belt from the spring loaded idler pulley.
Listen for switch to click as the idler arm is
moved up and down.
• If no click, replace belt switch.
• If click is heard; check switch for closed
circuit (0Ω) by isolating the switch. Take one
wire connector off the belt switch.
• 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 (infinite Ω), check motor thermal
protector, motor windings, and centrifugal
switch.
2. Remove wires directly from Motor Switch.
Start
Winding
3. Check for the resistance values of the
motor's Main and Start winding coils as
shown in chart.
nOTE: Main and Start winding coils
must be checked at the motor with wires
disconnected from centrifugal switch.
MAIN
START
• If the resistance at the motor is correct,
there is an open circuit (infinite Ω) between
the motor and the machine control
electronics.
• If the Start winding is in question and the
resistance is much greater than 15.2Ω,
replace the motor.
4. Door Switch problems can be uncovered
in the Door Switch Test #4. However, if
this was not done, the following can be
done without applying power to the dryer.
6-6
Main
Winding
4M to 5M
14.8 - Blue and White
15.2 Ω wires coming out
of the motor.
3M to 4M
14.8 - Blue and Violet
15.2 Ω wires coming out
of the motor.