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Troubleshooting Guide
Problem
Oven fan will not run
No control box cooling fan
Cooling fan continues to run
Document #: LIN_EO_SM_DIGCT_S2500_DOM&INTL_4606010 – 11/20
Section 5
Troubleshooting
Cause
Incoming Power Supply
5 Amp Fuse and Fuse Holder
Hi-Limit Thermostat, Control
Box
Oven Power Switch
Oven Fan Time Delay Relay
and Oven Fan Relay
Main Fan Motor and Capacitor Check for 208-240 VAC supply to the motor. If no voltage is present,
Incoming Power Supply
5 Amp Fuse and Fuse Holder
Control Box Hi-Limit
Thermostat
Oven Power Switch
Cooling Fan Motor
Control Box Thermostat
Check circuit breaker, reset if required.
Check power plug to be sure it is firmly in receptacle. Measure
incoming power, call power company if needed.
Check fuse for continuity, replace if necessary.
Check fuse holder for line voltage.
Terminals are normally closed and open at 140°F (60°C). If open, reset
thermostat and test oven for proper operation.
If thermostat will not hold, and control box temperature is not
exceeding 140°F (60°C), replace thermostat.
Check for 208-240 VAC supply to switch. If no voltage is present, trace
wiring back to fuse holder and control box high limit thermostat.
Check continuity between switch terminals. Replace switch as needed.
Check for 208-240 VAC at terminals 1 and 6 on time delay relay (TD).
If no voltage is present at (TD), check wiring back to Power Switch.
If voltage is present at TD 1 and 6, then check for 208-240 VAC output
to oven fan relay (R2) coil.
If no voltage is present, replace time delay relay.
If voltage is present, check normally open (N.O.) contacts of relay (R2)
for 208-240 VAC on both sides of the contact. If voltage is present to
coil and to one side of the N.O. contact, but not the other, replace
relay. If voltage is present then proceed.
trace wiring back to the relay (R2). If voltage is present but motor does
not turn:
WITH POWER OFF: Turn fan blade to check for locked rotor.
WARNING: Capacitor has a stored charge, discharge before testing.
Check capacitor with multimeter.
Check motor for opens, shorts or grounds.
Replace as needed.
Check circuit breaker, reset if required.
Check power plug to be sure it is firmly in receptacle.
Measure incoming power, call power company if needed.
Check fuse for continuity, replace if necessary.
Check for continuity through the switch (T2).
Terminals are normally closed and open at 140°F (60°C), if open, reset
thermostat and test oven for proper operation.
If thermostat will not hold, and control box temperature is not
exceeding 140°F (60°C), replace thermostat..
Check for 208-240 VAC supply to switch. If no voltage is present, trace
wiring back to fuse holder and control box high limit thermostat (T2).
Check continuity between switch terminals. Replace switch as needed.
Check for 208-240 VAC supply to the cooling fan. If no voltage is
present, trace wiring back to the relay (R2).
If voltage is present and motor does not run, check for opens, shorts
or grounds.
WITH POWER OFF: Check for locked rotor.
Replace as needed.
Check cooling fan thermostat. Thermostat closes at 120°F (49°C) and
opens at 100°F (38°C).
Please note: Thermostat will remain closed if control box temperature
remains above 120°F (49°C).
Correction
21
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