PAGE 14
FOR SERVICE TECHNICIAN’S USE ONLY
DO NOT REMOVE OR DESTROY
NOTE:
On the gas dryer, the inlet thermistor is
located at the top of the drum inlet vent. Refer
to Strip Circuit on page 22 to diagnose heater
system.
Dryer does not heat:
Display flashes L2 (electric only):
Locate the components using Figures 12a
and 12b.
ELECTRIC DRYER ONLY:
3
Quick Check: Perform steps under “Install
Diagnostics”, page 5, to test for L1 and L2
line voltage.
• If L1 is present, the heater relay is
receiving L1 line voltage.
• If L2 is present, the heater relay is
receiving L2 line voltage, confirming that
the centrifugal switch, heater, high limit
thermostat, and the thermal cut-off are
functional.
1.
Unplug dryer or disconnect power.
2.
Remove front panel and drum assembly
to access thermal components.
3.
Using an ohmmeter and referring to the Strip
Circuit or Wiring Diagram, measure the resistance
from the red wire terminal at the thermal cut-off
to the red wire terminal at the heater.
If the resistance is about 10
Ω
, go to step 5.
If an open circuit is detected, or resistance
is much greater or less than 10
Ω
, go to
step 4.
4.
Visually check the wire connections to
the thermal cut-off, high limit thermostat, and
heater. If the connections look good, check for
continuity across each of these components.
Refer to Strip Circuit on page 22.
Replace the heater if it is electrically open.
Replace both the thermal cut-off and high
limit thermostat if either the thermal cut-off
or the high limit thermostat is electrically open.
Part of Heating System
Electric
Dryer
Gas
Dryer
Harness/connection
�
�
Heater relay
�
�
Thermal cut-off
�
�
Thermal fuse
no
�
High limit thermostat
�
�
Heat element assembly
�
no
Gas valve assembly
no
�
Centrifugal switch
�
�
Outlet thermistor
�
�
Inlet thermistor
�
�
Machine control electronics
�
�
Console electronics and housing
assembly
�
�
Gas supply
no
�
Figure 12a - Thermal components,
electric dryer, viewed from front.
Figure 12b - Thermal components,
gas dryer, viewed from front.
Thermal Cut-Off
Inlet
Thermistor/
High Limit
Thermostat
Outlet
Thermistor
Heater Element
Thermal Fuse
Thermal Cut-Off
High Limit
Thermostat
Flame
Sensor
Outlet
Thermistor
Thermal
Fuse