Lincoln 1455 Manuel D’Utilisation

Impinger I -–Adv Digital – Electric Service Manual - International 

6 

 

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 required. 

 

Fuse, 10 Amp 

Check, replace if necessary. 

 

Fuse holder 

Check, replace if necessary. 

 Thermostat, 

control 

box hi-limit 

Terminals are normally closed, open at 130

°F (55°C). If 

open, reset and test for proper operation. If thermostat 
will not hold, and control box temperature is not 
exceeding 130

°F (55°C), replace thermostat. 

 

Switch, oven power 

Check for line voltage supplied 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 line voltage supplied to motor. If no voltage is 
present, trace wiring back to oven power 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 required. 

 

Fuse, 10 Amp 

Check, replace if necessary. 

 

Fuse holder 

Check, replace if necessary. 

 

Switch, oven power 

Check for line voltage supplied 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 supply voltage to the cooling fan. If no 
voltage is present, trace wiring back to the fuse holder. 
If voltage is present and motor does not run, check 
motor 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 required. 

 

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 

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” 

 

Air pressure switch 

Check air switch terminals for supply voltage to 
terminals NO and COM. If voltage is present on one side 
only, check for air tube blockage or misalignment. If 
these are okay, adjust air pressure switch or replace 
switch as needed. 

 

Oven cavity hi-limit 
thermostat 

Terminals are normally closed, opens at 660

°F (350°C). 

If open, reset and test oven for proper operation. If 
thermostat will not hold for maximum temperature, and 
oven is not exceeding control setting, check for proper 
location of the capillary bulb in its spring holder. If above 
checks are okay, replace hi-limit thermostat.  

 

Control transformer 

Check for supply voltage to primary of control 
transformer. If no voltage is present, trace wiring back to 
oven power switch. If voltage is present, check for