Part # 3052000 (09/16/09)
Page 32
Oven (Standard & Convection)
PROBLEM
POSSIBLE CAUSE
SOLUTION
Oven too hot or not hot enough
Thermostat out of calibration
Check Calibration
Burner flame too large
Incorrect setting pressure or injector
Check setting pressure and injector
Burner flame soft-yellow tip
Insufficient primary air
Check aeration shutter setting
Flame lifts off burner ports
Excessive primary air
Check aeration shutter setting
Flame lights back to the injector
Excessive primary air
Check aeration shutter setting
Burner “pops” when turned off
Excessive primary air
Check aeration shutter setting
Delayed ignition
Pilot flame too small
Check pilot flame length
Burner ports blocked
Clean burner
Incorrect aeration
Check aeration shutter setting
Incorrect setting pressure
Check setting pressure
Pilot burner will not ignite
Pilot orifice blocked
Clean jet
Pilot adjusting screw closed
Open and adjust flame
Pilot keeps going out
Pilot flame too small
Check pilot flame length
Loose thermocouple connection
Tighten connection
Faulty thermocouple
Replace thermocouple
Faulty gas/safety valve
Replace valve
Low millivolt output on open circuit tests
Pilot flame too small
Adjust pilot flame length
Defective thermocouple
Replace thermocouple
Millivolt output high in open circuit test
but low in closed circuit
Faulty gas/safety valve
Replace valve
Millivolt output high on closed circuit
test but flame safety tap will not stay
open
Faulty gas/safety valve
Replace valve
Door will not stay closed
Insufficient tension on springs
Adjust tension
Broken spring
Replace spring
Broken hinge link
Replace
Door will not stay open
Too much tension on springs
Adjust tension
Door not closing on one side
Door warped
Replace door
Door not level or low in centre
Trunion support loose
Level and tighten
Trunion support worn
Replace
Oven (Standard Only)
Burner flame shuts off when oven is at
the required temperature
Thermostat has incorrect by-pass rate
Adjust by-pass or replace them
TROUBLESHOOTING GUIDE