Bertazzoni Cooktops E3E / E4E Error: Supply voltage out of range
What Does E3E / E4E Mean on a Bertazzoni Induction Cooktop? E3E and E4E are abnormal supply voltage fault codes on Bertazzoni induction cooktops. E3E signals that the incoming line voltage has exceeded the safe upper limit — typically sustained above 253 V on a 240 V circuit. E4E signals the opposite: voltage has dropped […]
Quick Assessment
Answer to continue safely
Is it safe to keep using?
No. Operating an induction cooktop on incorrect voltage can destroy the IGBT modules and other power electronics. Do not use until voltage is verified within the 208–240 V range.
Can I reset the code?
Yes. If the cause was a tripped breaker or a temporary utility voltage dip, correcting the supply voltage clears the error automatically when the cooktop is next powered on.
When to stop immediately?
Stop if you notice: Error persists after the breaker is reset and supply voltage is confirmed correct, Other appliances in the home also malfunction simultaneously.
Symptoms You May Notice
Induction zones flicker between power levels or shut down immediately after being turned on during periods of electrical instability
The control board continuously monitors line voltage. When voltage drifts outside the safe window — even briefly — the firmware shuts down switching operations to protect the IGBT modules from operating at incorrect voltages.
All zones refuse to turn on and E3E or E4E appears on the display after a circuit breaker event or utility outage
A partially tripped double-pole breaker delivering only 120 V to the cooktop, or a utility voltage excursion, will trigger these codes immediately on the next power-up.
Possible Causes
Supply voltage outside safe operating range
E3E indicates sustained voltage above approximately 253 V on a 240 V circuit. E4E indicates voltage below approximately 196 V. Both prevent safe IGBT switching operation.
Requires ProfessionalOne leg of the 240 V split-phase circuit has failed
A partially tripped double-pole breaker or a blown fuse on one leg delivers only 120 V to the cooktop. The control board measures the asymmetric voltage and displays the abnormal voltage fault.
Requires ProfessionalSafe Checks You Can Do
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1
Check the dedicated circuit breaker
Locate the cooktop's dedicated double-pole breaker. Turn it fully off and back on firmly. A breaker that appears ON but is actually tripped sits slightly off-centre in the panel.
Bertazzoni induction cooktops require a dedicated 240 V circuit — typically 40 A or 50 A. Confirm no other high-draw appliance shares the circuit.
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2
Measure supply voltage at the junction box
Use a multimeter to measure voltage at the cooktop junction box. Reading between the two hot terminals should be 208–240 V. A reading of approximately 120 V indicates one leg of the circuit is dead.
If other large appliances in the home also behave erratically, the issue is with the utility supply or main panel, not the cooktop.
Tools required
When to Call a Professional
Contact a qualified technician if:
- Voltage at the junction box measures outside 196–253 V with a known-good meter
- One hot terminal at the junction box reads 0 V indicating a dead leg
- Internal power supply board shows thermal damage consistent with overvoltage
Need Professional Help?
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