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70291301
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Electronic Control Troubleshooting
43. Will Not Heat – Gas – EDC Models
T032D
Note: Tests are conducted with unit
running and calling for heat.
All voltage checks are referenced
to transformer neutral.
Correct wiring
between FS-2 and
COM of lint drawer.
Is there voltage on
FS-2 of EDC control?
Is there voltage
on FS-1 of
EDC control?
Correct wiring
between COM of
airflow switch and
FS-1 of EDC
control.
Is there voltage on
COM of airflow
switch?
Check for proper
function of airflow
switch and replace
if necessary.
Is there voltage across
COM & N.C. terminal
of airflow switch?
Correct wiring
between terminal
7 on motor
control relay and
N.C. terminal on
airflow switch.
Is there voltage on
terminal 7 of motor
control relay?
Replace motor
control relay.
Is there voltage across
terminals 7 & 4 of
motor control relay?
Correct wiring
between terminal
3 of fan motor
centrifugal switch
and terminal 4 of
motor control relay.
Is there voltage on
terminal 3 of fan
motor centrifugal
switch?
Replace fan motor.
Is there voltage across
terminals 3 & 5 of
fan motor centrifugal
switch?
Correct wiring
between cabinet
limit and terminal
5 of fan motor
centrifugal switch.
Is there voltage to the
input side of the
cabinet limit?
Replace cabinet
limit.
Is there voltage across
cabinet limit?
Correct wiring
between stove limit
and cabinet limit.
Is there voltage to the
input side of the stove
limit?
NO
YES
Is the
thermistor
operational?
Replace EDC
control.
Replace
thermistor.
YES
NO
NO
YES
NO
YES
YES
NO
NO
YES
YES
NO
NO
YES
YES
NO
NO
YES
YES
NO
NO
YES
Continued on next
page.
Single and stacked
units.
T032D