Lincoln Foodservice 1633-000-EA, Parts & Service Manual

Low Profile –1600 Series Advantage Digital Service Manual -–Int’l

5

TROUBLESHOOTING GUIDE 

                                                       
 
                                 MODEL 1633-000 EA   NATURAL GAS   230 VAC   50 HZ   1 PHASE 
                                 MODEL 1634-000-EA   LP GAS               230 VAC   50 HZ   1 PHASE 
 
 

NOTE: When checking components on left side of unit, be sure to check for proper connections in power 
connector, (marked P. C. on schematic diagram) located inside motor cover.  

SYMPTOM POSSIBLE 

CAUSE 

EVALUATION 

Incoming power supply

Check breakers/ reset if required call Power company 
if needed

Oven fan switch

Check continuity between switch terminals.

Hi-limit thermostat(s),   control 
box  

Terminals are normally closed, if open, reset 
thermostat and test oven for proper operation. If it will 
not reset, replace thermostat. 

Fan fuse 

Check, replace if necessary. 

Fuseholder 

Check, replace if necessary. 

Oven fan relay 

Check for power to coil of oven fan relay. If no voltage 
is present, trace wiring back to hi-limit thermostat. 
Check for supply voltage at terminal #6 of the relay. If 
no voltage is present, trace wiring back to fuse holder. 
If voltage is present, at the relay coil, check to insure 
the contacts are closing. 

Capacitor(s) 

Check for opens, shorts, or grounds. 

Oven fan will not 
run

Motor(s), main fan 

Check for opens, shorts, or grounds. 

Fan switch 

(SEE OVEN FAN WILL NOT RUN.) 

Hi-limit thermostat(s) 

Oven fan relay 

No control box 
cooling

Cooling fan(s) 

Supply voltage should now be at these motors. If 
voltage is present, check motor for open, shorts, or 
grounds. WITH POWER OFF: check for locked rotor. 

Incoming power supply 

Check circuit breakers, reset if needed. Call power 
company if needed. 

Cooling fan thermostat(s) 

Check the cooling fan thermostat.(thermostat closes 
at 120

°

F and opens at 100

°

F). With the cooling fan 

thermostat preheated, check for continuity. If switch is 
open, replace. 

No automatic 
control box cooling 

Cooling fan(s) 

Supply voltage should now be at these motors. If 
voltage is present, check motor for opens, shorts or 
grounds. WITH POWER OFF: Check for locked rotor. 

Gas supply 

Check for adequate gas supply to oven. 

Manual gas shut off valve 

Check to see that the manual gas shut off valve is 
open. Also check flexible gas line connection for any 
damage. 

Fan switch 

Check to see that the fan switch is on. 

Oven will not heat 

Main oven fan 

Check if main oven fan is operating. If not, refer to 
“Oven fan will not run”. 

NOTE: These ovens utilize 2 complete Burner/Temperature control systems. Each system will Follow the same 
troubleshooting sequence. 
 

Oven power relay 

Check for line voltage to the relay coil. If no voltage is 
present, trace wiring back to the control box hi-limit 
thermostat(s). If voltage is present, check to insure 
contacts are closing. Replace relay as needed. 

Fuse, burner 3A.

Check, replace if necessary.

Serial Number 
L31478 & Below 

Fuseholder

Check, replace if necessary.