Alliance Laundry Systems BU170S Service Manual Page 37

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70422201R1
35
Troubleshooting
20.Cylinder Turns, But Will Not Heat
TMB2369S-a
Cylinder turns,
but will not heat
Does airflow
switch stay
open?
Is fan turning
counterclockwise
as viewed from
the front?
Reverse any
two of the
electrical
service leads at
the fan motor
contactor.
Refer to
Installation
Manual for
makeup air and
exhaust duct
requirements.
Is gas
shut-off
valve
open?
Open gas shut-
off valve.
Ye s
No
Ye s
No
No
Ye s
Is there 24 volts
present at output
terminal of stove
high limit
thermostat?
Check for
broken or loose
wire to relay.
Is there 24 volts
present at input
terminal of stove
high limit
thermostat?
Replace stove
high limit
thermostat.
Is there 24 volts
present at output
terminal of airflow
switch?
Check for
broken or loose
wire to stove
high limit
thermostat.
Ye s
No
Ye s
No
Ye s
No
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