Bertazzoni Ovens E4 Error: Broiler sensor fault
What Does E4 Mean? E4 on a Bertazzoni wall oven indicates a fault with the broiler RTD temperature probe. The control board monitors the broiler sensor continuously — when its resistance falls outside the specification, the board disables the broil element and logs E4. This fault appears on Professional Series and Master Series dual-fuel wall […]
Quick Assessment
Answer to continue safely
Is it safe to keep using?
No. Broil functions must not be used while E4 is active. Bake functions can typically continue on dual-sensor models while awaiting repair. Schedule service within a few days to prevent connector corrosion from spreading.
Can I reset the code?
Yes. A 2-minute circuit breaker power-cycle clears the E4 flag. The code will return on the next broil attempt if the sensor or connector is not repaired.
When to stop immediately?
Stop if you notice: E4 appears during bake functions in addition to broil, Oven temperature is uncontrolled during any mode.
Symptoms You May Notice
Broiler element does not activate and oven shuts off mid-broil
Selecting the broil function results in no heat from the upper element, or the oven begins broiling then cuts off mid-session as the control board detects the broiler sensor delivering an invalid signal.
Bake and convection bake functions may continue to work normally
On wall ovens with separate bake and broiler sensors, standard bake functions using the lower element can remain available while E4 is isolated to the broiler circuit.
Oven shuts off mid-broil and displays E4 on the digital panel
The fault can appear mid-cycle rather than at startup when the broiler sensor has a marginal fault — the resistance reading stays within range initially then drifts out of specification as the probe heats up.
Possible Causes
Broiler RTD probe internal failure
The probe element has fractured or degraded from repeated high-temperature broil cycles, pushing its resistance outside the specification and triggering the E4 fault on the next broil attempt.
Requires ProfessionalBroiler sensor connector loose or corroded from grease exposure
The connector on the oven interior wall near the broil element has accumulated grease or corrosion from proximity to the high-heat broil element, creating an intermittent or open circuit.
Requires ProfessionalSafe Checks You Can Do
-
1
Power-cycle and test broil function once
Switch the circuit breaker off for 2 full minutes, restore power, and select the broil function. If E4 appears within the first heating attempt, the probe or connector requires professional replacement — do not attempt broil again until repaired.
If bake functions work normally while broil produces E4, the fault is isolated to the broiler sensor circuit and the oven can be used for baking while awaiting repair.
-
2
Inspect the broiler sensor connector if accessible
With the oven completely powered down, open the door and look near the upper rear of the cavity for the broiler sensor probe and connector. Confirm it is fully seated — a loose connector from a recent service visit can cause E4 without probe failure.
Grease accumulation on the connector pins is common on ovens used frequently for broiling — a service technician can clean and re-seat the connector as part of the repair visit.
When to Call a Professional
Contact a qualified technician if:
- E4 returns on every broil attempt after a power-cycle reset
- Broiler sensor connector shows visible burn marks or corrosion damage
- E4 fault also affects bake mode, indicating the fault has spread beyond the broiler circuit
Need Professional Help?
Find qualified technicians in your area for proper diagnostics and repair.
Ovens Repair Service Schedule Appointment