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Typical faults assuming all wiring is correct:
Symptom
Fault
HLO on switching On mains
Component fault on main PCB, incorrect wiring
HLO on turning On oven/grill
Fault on control board / potentiometer, incorrect
wiring
Oven start up, burner lights and
Short circuit thermistor assembly.
immediately goes out, oven ready
Note:
at room temperature, thermistor
light on.
resistance is approximately 100k
Ω
.
Oven fails to ignite, (check that
1. Incorrectly positioned or open circuit
electrode sparks correctly)
spark electrode (note both grill and oven
electrodes must be connected).
2. Faulty solenoid valve.
3. Gas not at appliance.
4. Blocked injector jet.
Oven goes out before set temperature
1. Incorrectly adjusted spark electrode (low
is reached
flame current).
2. Low gas pressure.
3. Incorrectly positioned potentiometer.
4. If oven goes out after approximately 4 mins,
this is due to a disconnected or open circuit
thermistor.
Oven fails to re-ignite after set
1. Incorrectly set spark electrode.
temperature is reached
2. Low Gas Pressure.
Oven fan fails to start,
1. Open circuit in programmer.
burner does not light
2. Component failure on main board
3. Component failure at control board.
FAULT FINDING