Error Code
Bertazzoni Wall Ovens Error Code Er04
Er04 typically indicates a temperature sensor malfunction or communication error between the control board and the temperature sensing probe. This error prevents the oven from accurately monitoring and regulating internal cooking temperatures.
Quick Diagnostics
Signs
6 identified
Possible Causes
8 listed
Safety Checks
10 steps
If unsure, stop using the appliance and contact a certified technician immediately.
What you notice
Signs
6
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01• Oven will not heat or maintains incorrect temperatures
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02• Digital display shows Er04 code and oven locks out from operation
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03• Heating element may cycle on and off erratically
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04• Oven beeps repeatedly or displays error message on control panel
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05• Unable to select cooking functions or temperature settings
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06• Oven may shut down mid-cycle during cooking
Why it happens
Possible Causes
8
A
• Temperature sensor probe (RTD or thermistor) is defective or has failed
B
• Loose or corroded electrical connection between sensor and control board
C
• Damaged wiring harness connecting temperature probe to main control board
D
• Control board failure or malfunction preventing sensor signal recognition
E
• Moisture or condensation inside sensor connector causing short circuit
F
• Sensor probe positioned incorrectly or not fully inserted into oven cavity
G
• Power supply voltage fluctuation affecting 120V/240V circuit to control electronics
H
• Failed relay or capacitor on control board circuit
DIY — No disassembly
Safety Checks You Can Do
10
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1• Turn off the circuit breaker serving your Bertazzoni wall oven for 60 seconds, then switch it back on to perform a complete system reset
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2• Allow the oven to cool completely before attempting any troubleshooting steps
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3• Check that the circuit breaker dedicated to your wall oven has not tripped; reset if necessary
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4• Verify the oven's power cord is fully connected to the wall outlet and wall outlet is functioning properly
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5• Inspect the oven interior for any visible debris, spilled food, or excess moisture and clean gently with a soft cloth if present
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6• Ensure all oven racks are properly seated in their slots and not obstructing the temperature sensor area
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7• Review the control panel to confirm no buttons are stuck or held down inadvertently
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8• Check your user manual for any temporary control lock feature that may be activated
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9• Attempt to clear the error by pressing the cancel or reset button on the control panel
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10• If error persists after these steps, discontinue use and contact a qualified Bertazzoni service technician or authorized repair center
Always unplug the appliance before performing any physical check. These are visual/external checks only.
Still having trouble?
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