Bertazzoni Oven Error Code ER21: How to Fix It

Q: What does error code ER21 mean on a Bertazzoni oven?

Error code ER21 indicates the flame sensor is sending a weak signal. The sensor cannot properly detect the flame, so the oven may fail to light or turn off during use.

Q: Can I clean the flame sensor myself?

Yes. Cleaning with fine-grit sandpaper can remove carbon buildup and often resolves the issue. Ensure the oven is unplugged and you locate the sensor near the burner.

Q: How much does it cost to replace a Bertazzoni oven flame sensor?

A replacement flame sensor typically costs between $20 and $50. Labor costs add $100-$200 if you hire a technician.

Q: Will error ER21 reset itself?

No. You must fix the underlying cause. The error will clear once the oven is repaired and restarted, or it may persist until the sensor is cleaned or replaced.

Q: Is it safe to use the oven with error ER21?

No. The oven may not light or could shut off unexpectedly, which is a gas safety hazard. Repair the issue before using the oven.

Abstract

Error code ER21 on your Bertazzoni oven indicates a weak or failing flame sensor. The sensor detects the flame inside the oven and tells the gas valve to stay open. If it's weak, the oven may not light or may shut off during use.