Bertazzoni Ranges E4 Error: Broiler temp sensor fault
What Does E4 Mean? E4 on a Bertazzoni range indicates a fault with the broiler RTD temperature probe. The control board monitors the probe’s resistance continuously — at room temperature a healthy probe reads approximately 1080–1100 ohms. When that value falls outside the acceptable range, the board logs E4 and disables the broiler element to […]
Quick Assessment
Answer to continue safely
Is it safe to keep using?
No. The oven can be used for bake functions on dual-sensor models, but the broil function must not be used until E4 is resolved. Schedule service within a few days to prevent progressive connector corrosion from damaging the control board.
Can I reset the code?
Yes. A 2-minute circuit breaker power-cycle clears the E4 fault flag. The code will return on the next broil attempt if the underlying sensor fault has not been repaired.
When to stop immediately?
Stop if you notice: E4 appears during bake functions as well as broil, Oven temperature is visibly uncontrolled during any cooking mode.
Symptoms You May Notice
Broiler element does not heat and oven shuts off mid-broil
Selecting the broil function produces no heat from the upper element, or the oven begins broiling but cuts off partway through as the control board detects an invalid signal from the broiler probe.
Oven temperature reading is erratic or frozen during broil attempts
The temperature display may show an implausible fixed value or fluctuate wildly because the broiler sensor is feeding the control board noise rather than a valid resistance reading.
Bake functions may still operate normally
On models with separate bake and broiler sensors, standard bake and convection bake can continue to work while E4 is present, confirming the fault is isolated to the broiler sensor circuit.
Possible Causes
Broiler RTD probe internal failure
The probe resistance has drifted outside the 1080–1100 ohm room-temperature specification due to internal fracture or element degradation caused by repeated high-temperature broil cycles.
Requires ProfessionalBroiler sensor connector loose or corroded
The connector joining the broiler probe lead to the control board has pulled loose or accumulated grease and corrosion from proximity to the broil element, creating an intermittent or open circuit.
Requires ProfessionalSafe Checks You Can Do
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1
Power-cycle the range
Switch the dedicated circuit breaker off for 2 full minutes and restore power. Attempt to use the broil function once — if E4 reappears within the first heating attempt the probe has failed and requires replacement.
Bake and convection functions can typically be used while awaiting repair if the E4 fault is confirmed isolated to the broiler sensor.
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2
Inspect the broiler sensor connector
With the oven fully unplugged, open the oven door and inspect the rear wall near the broil element for a visible probe and connector. Check that the connector is fully seated without disassembling panels.
Grease accumulation on the connector pins is common on frequently used broilers — a service technician can clean and re-seat the connector as part of a probe replacement visit.
When to Call a Professional
Contact a qualified technician if:
- E4 returns immediately after every power-cycle reset
- Broiler sensor connector shows visible corrosion or burn damage
- Fault appears across both bake and broil modes simultaneously
Need Professional Help?
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