Convotherm E11/E21 Error Code

What does Convotherm E11/E21 mean?

E11/E21 indicates excess temperature in the oven or an oven sensor failure. The manual lists excess oven temperature and an oven sensor fault as the causes, directing both to customer service. The control trips this code to protect the oven chamber when the measured temperature is too high or when the sensor reading cannot be trusted.

Symptoms

• Display shows error code E11 or E21
• Oven temperature reads abnormally high or erratic
• Cooking program stops as a protective measure

Common causes

• Excess oven temperature
• Oven temperature sensor fault

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Diagnostic steps

1. Allow the oven to cool

   If excess oven temperature triggered the code, letting the chamber cool may allow normal operation to resume.

2. Note the displayed temperature

   Record any abnormal readings so a technician can tell an over-temperature event from a sensor fault.

3. Power-cycle the unit

   Switch the combi off and on to confirm whether the code clears or returns.

4. Call customer service

   The manual directs both excess oven temperature and an oven sensor fault to customer service.

When to call a professional

The manual sends both causes of E11/E21, excess oven temperature and an oven sensor fault, to customer service. If the code does not clear after the chamber cools, stop using the oven and contact a qualified Convotherm by Cleveland authorized service representative; testing and replacing the oven temperature sensor requires service tools and access to internal wiring.