Bertazzoni Ranges FAULT-BROILER-KNOB Error: Broiler temp knob mis-set
What Does FAULT-BROILER-KNOB Mean? FAULT-BROILER-KNOB is not a component failure — it is a configuration alert on older Bertazzoni Professional Series gas ranges. The PRE-HEATING indicator flashes with a buzzer when the temperature selector is not positioned at exactly 500 °F (the Tmax detent) while a broil or convection broil function is selected. The control […]
Quick Assessment
Answer to continue safely
Is it safe to keep using?
No. This is a routine configuration reminder, not a safety fault. Correct the temperature knob position and the oven will operate normally — no service call or repair is needed.
Can I reset the code?
Yes. The alert clears instantly when the temperature knob is moved to the correct position. No circuit breaker reset is needed.
When to stop immediately?
Stop if you notice: PRE-HEATING light continues flashing after setting the knob to exactly 500 °F, Burning smell from the broil area during any attempt to clear the alert.
Symptoms You May Notice
Broiler does not ignite despite function selector being in BROIL position
The burner or element fails to produce any heat when broil is selected, because the control circuit requires the temperature knob to be set to exactly 500 °F before it will energise the broil element or burner.
PRE-HEATING light flashes with buzzer when broil is selected
The front-panel PRE-HEATING LED pulses with an audible tone, acting as an operator prompt to correct the temperature knob position rather than indicating a component failure.
Fault clears immediately when selector is corrected
Moving the temperature knob to the 500 °F position and returning the function selector to BROIL clears the alert instantly, confirming this is a configuration state rather than a hardware fault.
Possible Causes
Temperature knob set above or below 500 °F for broil
The Bertazzoni Professional Series range requires the temperature knob to sit exactly at the 500 °F (Tmax) mark for Broil and Convection Broil — any position above or below that detent triggers the alert.
DIY PossibleTemperature knob above Tmax for standard bake functions
Setting the temperature knob beyond the maximum bake temperature for non-broil functions similarly triggers the PRE-HEATING alert, as the control circuit interprets this as an out-of-range command.
DIY PossibleSafe Checks You Can Do
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1
Turn function selector to OFF and reset temperature knob
Rotate the function selector to OFF, then set the temperature knob to exactly 500 °F — look for the detent or Tmax label on the knob scale. With both knobs correctly positioned, re-select BROIL and the oven should begin preheating normally.
The 500 °F position is typically the last marked temperature before a gap or end-stop on the temperature knob — do not force the knob past this position.
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2
Confirm correct function-to-temperature pairings
Consult the use and care guide for your specific range model to review which temperature settings are valid for each function. Convection Broil also requires 500 °F; standard bake functions use the full temperature range up to (but not exceeding) 500 °F.
If the knob markings are worn or unclear, a replacement knob set is available from Bertazzoni parts — this is a common maintenance item on heavily used Professional Series ranges.
When to Call a Professional
Contact a qualified technician if:
- Fault persists after correctly positioning both selectors at 500 °F
- Temperature or function selector knob is loose, cracked, or spins freely without detents
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