Lincoln 1451 Manual Do Utilizador

Impinger I – 1450 Series Service Manual - Domestic 

4 

SYMPTOM POSSIBLE 

CAUSE EVALUATION 

Oven fan will not run 

Incoming power supply 

Check circuit breaker, reset if required. Check power 
plug to be sure it is firmly in receptacle. Measure 
incoming power, call power co. if needed. 

 

Fuse, 10 Amp 

Check, replace if necessary. 

 

Fuse holder 

Check, replace if necessary. 

 

Switch, oven power 

Check for 120VAC supply to switch. If no voltage is 
present, trace wiring back to fuse holder. Check 
continuity between switch terminals. Replace switch as 
needed. 

 

Motor, main fan 

Check for 120VAC supply to the motor. If no voltage is 
present, trace wiring back to the switch. Check motor 
for opens, shorts or grounds. 
WITH POWER OFF: Turn fan blade to check for locked 
rotor. 

No control box cooling 

Incoming power supply 

Check circuit breaker, reset if required. Check power 
plug to be sure it is firmly in receptacle. Measure 
incoming power, call power co. if needed. 

 

Fuse, 10 Amp 

Check, replace if necessary. 

 

Fuse holder 

Check, replace if necessary. 

 

Switch, oven power 

Check for 120VAC supply to switch. If no voltage is 
present, trace wiring back to fuse holder. Check 
continuity between switch terminals. Replace switch as 
needed. 

 

Cooling fan 

Check for 120VAC supply to the cooling fan. If no 
voltage is present, trace wiring back to the oven power 
switch. If voltage is present and motor does not run, 
check for opens, shorts or grounds. 
WITH POWER OFF: Check for locked rotor. 

No automatic control 
box cooling 

Incoming power supply 

Check circuit breaker, reset if required. Check power 
plug to be sure it is firmly in receptacle. Measure 
incoming power. Call power co. if needed. 

 

Cooling fan thermostat 

Check cooling fan thermostat (thermostat closes at 
120

°F and opens at 100°F). With cooling fan 

thermostat pre-heated, check for continuity. If 
thermostat is open, replace cooling fan thermostat. 

Control box cooling 
fan continues to run 

Cooling fan thermostat 

See “Cooling fan thermostat” (NOTE: Thermostat will 
remain closed if control box temperature remains 
above 120

°F. 

Oven will not heat 

Main fan 

If not operating, refer to “Oven fan will not run”. 

 

Gas supply 

Check for adequate gas supply to oven.  

 

Centrifugal switch of main fan 
motor 

Check for 120VAC at wire #5 (input to centrifugal 
switch, located at 6-pin connector inside motor cover 
near main fan motor) to neutral. If no voltage is present, 
trace wiring back to oven power switch. If voltage is 
present, check for 120VAC at wire #9 (output of 
centrifugal switch) to neutral. If no voltage is present at 
wire #9, and the motor is running, replace the main fan 
motor. 

 

Burner blower motor 

Check for 120VAC supplied to burner blower motor. If 
no voltage is present, trace wiring back to primary of 
control transformer. If voltage is present and motor is