Error Detected May 1, 2026
Error Code

Bertazzoni Wall Ovens Error Code Er05

Er05 indicates a temperature sensor malfunction or communication error between the oven's control board and temperature probe. This error prevents the oven from accurately monitoring cooking temperature and may disable heating functions.

Book a Repair Ask an Expert
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
  • 01
    • Oven fails to heat or reaches incorrect temperatures
  • 02
    • Display shows Er05 code and oven stops mid-cycle
  • 03
    • Unable to select cooking modes or temperature settings
  • 04
    • Heating elements may not respond to control adjustments
  • 05
    • Oven may emit beeping sounds repeatedly
  • 06
    • No heat detected during preheating cycle
Why it happens

Possible Causes

8
A
• Temperature sensor (RTD probe) is disconnected, damaged, or corroded
B
• Loose wiring connections between sensor and control board
C
• Faulty temperature sensor requiring replacement
D
• Control board circuit malfunction or component failure
E
• Moisture or grease buildup on sensor contacts affecting signal transmission
F
• Power supply voltage fluctuations affecting 120V/240V circuit stability
G
• Failed relay or capacitor on the main control board
H
• Damaged sensor wiring harness from age or thermal stress
DIY — No disassembly

Safety Checks You Can Do

10
  1. 1
    • Turn off the oven and check your home circuit breaker; ensure the breaker is in the ON position and has not tripped
  2. 2
    • If breaker is tripped, switch it OFF then back ON, and attempt to power the oven again
  3. 3
    • Allow the oven to cool completely for at least 30 minutes
  4. 4
    • Open the oven door and inspect the interior for moisture, water droplets, or excessive grease accumulation; wipe dry with a soft cloth if needed
  5. 5
    • Verify all oven racks are properly seated in their slots and not obstructing the back wall
  6. 6
    • Check the control panel display and confirm no buttons are stuck or being inadvertently pressed
  7. 7
    • Review your oven's user manual to confirm temperature settings are within normal operating range
  8. 8
    • Perform a hard reset: locate your home electrical panel, switch the oven's dedicated breaker to OFF, wait 60 seconds, then switch back to ON
  9. 9
    • Attempt to power on the oven and run a test cycle to see if error clears
  10. 10
    • If Er05 persists after these steps, contact Bertazzoni customer service or a certified technician for professional diagnosis
Always unplug the appliance before performing any physical check. These are visual/external checks only.
Still having trouble?

Our certified technicians diagnose and fix this error code permanently.

Schedule a Repair Call Us Now