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70380601
© Copyright, Alliance Laundry Systems LLC – DO NOT COPY or TRANSMIT
Electronic Control Troubleshooting
65. Unit Will Not Heat – Electric
Note: Tests are conducted with unit running
and calling for heat.
All voltage checks are referenced to
transformer neutral.
Correct wiring
between H5-13 and
N.O. of airflow
switch.
Is there voltage at
H5-13 of control?
Is there voltage
at H5-1 of
control?
Correct wiring
between input
terminal and H5-1.
Is there voltage at input
terminal of the motor
control relay?
Replace relay.
Is there
voltage at the
output terminal of the fan
motor relay?
Check motor for
proper operation.
Replace if
necessary
Is there voltage at
terminal 3 of the fan
motor?
Check motor
or replace if
necessary.
Is there voltage at
terminal 5 of fan motor
relay?
Check cabinet
limit for proper
operation. Replace
if necessary.
Is there voltage to the
output of the cabinet
limit?
No
Yes
Is the
thermistor
operational?
Replace
control.
Replace
thermistor.
Yes
No
No
Yes
No
Yes
Yes
No
No
Yes
Yes
Yes
No
No
Yes
(1)
(2)
(3)
(4)
(5)
(6)
(8)
(9)
TMB2277S-a
Correct wiring
between cabinet
limit and terminal 5
of fan motor.
Is there voltage to the
input of the cabinet
limit?
No
(7)
Correct wiring
between stove limit
and normally open
terminal of the
airflow switch.
Is there voltage to the
input of the stove limit?
Check operation of
stove limit. Replace
if necessary.
Is there voltage to the
output side of the stove
limit?
Yes
No
No
Yes
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page
(10)
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