Maytag MDE17CS - Heater Test Procedures

6-7
On stack dryers, Door Switch problems
can be uncovered in the Door Switch
Diagnostic Test; however, if this was not
done, the following can be done without
applying power to the dryer. Connect an
ohmmeter across neutral, white or any bare
Earth connection and the red connector on
terminal #8 of the AA7 connector on the
control board.
• With the door properly closed, the
ohmmeter should Indicate continuity
(0–2 Ω).
• If not, replace the door switch assembly.
6.
TEST #3 Heater Test
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:
Part of Heating system
Electric
Dryer
Gas
Dryer
Harness / connection yes yes
Heater relay yes yes
High temp cutout yes yes
Thermal fuse yes yes
High temp thermostat yes yes
Heat element assembly yes no
Gas burner assembly no yes
Centrifugal switch yes yes
Exhaust thermistor yes yes
Machine control electronics.
See ESD information.
yes yes
Console electronics and
housing assembly
yes yes
Gas supply no yes
•
•
Dryer does not heat:
STACK ELECTRIC DRYER:
Unplug dryer or disconnect power.
Remove the service panel to access the
thermal components.
Using an ohmmeter and referring to the
wiring diagram, measure the resistance
between the yellow wire and the brown wire.
• If the resistance when cold is about 11 Ω,
go to step 5.
• If an open circuit
(infinite Ω)
is detected,
replace heater coil.
Visually Check the wire connections to the
high temp cutout, high temp thermostat,
and heater. If connections look good, check
for continuity (0 Ω) across each of these
components. Replace both the high temp
cutout and high temp thermostat if either
one is electrically open.
For stack electric dryers, if no open circuit
(infinite Ω)
is detected, measure resistance
at the orange wires located on the Heater
Relay Coil. When checking the relay coil
first pull the orange wires off the relay. Using
an ohm meter check for continuity (0 Ω).
•
If the circuit shows open, replace the relay.
• On stack dryers, if coil shows continuity (0
Ω)
replace the dryer control board.
• On CS models check the Heater Bypass
Switch (B) on the Timer. To check this
switch, remove the wire from one end then
check for continuity (0 Ω) across the switch
with the button pressed and not pressed,
readings should show continuity (0 Ω) and
then
open circuit
(infinite Ω)
resistance. It
these readings are not seen, replace the
timer.
1.
2.
3.
4.
5.