Convotherm E03

What does Convotherm E03 mean?

E03 reports a fan malfunction. The manual lists the motor temperature monitor being triggered, an external failsafe being triggered, or a fan motor fault as the conditions behind this code. Because even circulation of hot air and steam depends on the fan, the control stops normal operation and the manual directs all of these causes to customer service.

Symptoms

• Display shows error code E03 for fan malfunction
• Circulation fan does not run or runs abnormally
• Uneven heating or the unit stops cooking

Common causes

• Motor temperature monitor triggered
• External failsafe triggered
• Fan motor fault

Diagnostic steps

1. 01

   Allow the fan motor to cool

   The motor temperature monitor can trip when the motor overheats; letting the unit cool may clear the triggered monitor.

2. 02

   Note when the error appears

   Record whether E03 shows at startup or during cooking to help the technician identify which condition triggered it.

3. 03

   Check for an external failsafe trip

   The manual lists an external failsafe being triggered as a cause, so verify the unit's power and protection devices.

4. 04

   Call customer service

   The manual directs every E03 cause, including a fan motor fault, to customer service.

When to call a professional

The manual sends every cause of E03, including the motor temperature monitor, the external failsafe, and a fan motor fault, to customer service. If the code does not clear after the unit cools, stop using the oven and contact a qualified Convotherm by Cleveland authorized service representative, since fan motor and failsafe diagnosis involves live electrical work.