Bertazzoni Ranges LV4 Error: Control board comm fault
What Does LV4 Mean? LV4 is a control board communication or sensor fault code on Bertazzoni induction and dual-fuel ranges. When it appears, the board locks out all cooking functions — both the oven and induction zones stop responding — until a full power-cycle reset is performed. In many cases LV4 is triggered by a […]
Quick Assessment
Answer to continue safely
Is it safe to keep using?
No. The oven can be used again if LV4 does not return after a 5-minute power-cycle reset. If the fault persists, discontinue use and schedule service within a few days to prevent progressive control board damage.
Can I reset the code?
Yes. A 5-minute circuit breaker power-cycle frequently resolves LV4 when the cause was a transient power event. If the fault returns on the next cooking attempt, the control board requires professional inspection.
When to stop immediately?
Stop if you notice: LV4 returns within minutes of every reset attempt, Induction zones produce sparking or abnormal sounds after reset.
Symptoms You May Notice
Oven and induction zones stop responding and refuse to start
All cooking functions become unresponsive after LV4 appears — neither the oven cavity nor any induction zone will activate, because the control board has locked itself out pending a fault-clearance sequence.
Cooling fan runs continuously while LV4 is displayed
The fan continues to operate while the fault is active as the board attempts to maintain safe operating temperature during the lockout state.
Display shows LV4 and oven cannot be restarted normally
Standard button presses and selector movements do not clear LV4 — the fault persists until a full power-cycle reset is performed or the board is serviced.
Possible Causes
Control board internal communication or processor fault
The main control board has lost communication with a sensor module or experienced an internal ADC or processor fault, triggering the LV4 lockout to prevent operation with unreliable sensor data.
Requires ProfessionalPower-loss event corrupted control board memory state
A brief power fluctuation or outage can corrupt the board's operating state, causing it to boot into the LV4 fault mode on the next power-up.
DIY PossibleSafe Checks You Can Do
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1
Perform a full circuit breaker power-cycle
Switch the dedicated 240 V circuit breaker completely off for 5 full minutes to fully discharge the control board capacitors, then restore power and allow the board to complete its boot sequence before testing any function.
A 5-minute soak (rather than the standard 2 minutes) is recommended for LV4 because the fault can involve the board's non-volatile memory state.
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2
Test a single cooking function after reset
After power is restored, select a single bake function and wait 60 seconds. If LV4 does not reappear within the first minute of operation, the fault was likely a transient power-loss event and the range is safe to use.
If LV4 returns within the first few minutes of any cooking attempt, arrange professional service — do not continue using the range.
When to Call a Professional
Contact a qualified technician if:
- LV4 returns within minutes of a 5-minute power-cycle reset
- Multiple fault codes appear simultaneously alongside LV4
- Control board shows visible burn marks or swollen capacitors
Need Professional Help?
Find qualified technicians in your area for proper diagnostics and repair.
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