Thermador Oven Error Code E325: How to Fix It

Q: What does the Thermador oven error code E325 mean?

Error code E325 on a Thermador oven means the inverter board has exceeded its safe operating temperature. The inverter board controls power delivery to components like the convection fan motor, and when it overheats — due to poor airflow, a stuck fan, or a failing board — the oven triggers this fault code and shuts down to protect itself.

Q: Can I still use my Thermador oven after the E325 error?

No, you should not continue using the oven until the E325 error is resolved. The oven may shut itself down mid-operation as a safety measure, and continued use while the inverter board is overheating could cause permanent damage to the board or other electronics in the appliance.

Q: Will turning the oven off and back on fix the E325 error?

A reset may temporarily clear the error if the board overheated due to a one-time event such as an unusually long cook cycle in a warm kitchen. However, if the underlying cause — such as a blocked vent or failing cooling fan — is not addressed, the E325 error will return quickly. Always investigate and fix the root cause rather than relying on resets.

Q: How much does it cost to replace a Thermador oven inverter board?

A replacement inverter board for a Thermador oven typically costs between $150 and $400 for the part alone, depending on the specific model. If you hire a professional technician, labor costs can add another $100 to $200, bringing the total repair to approximately $250 to $600. Always get a quote before authorizing the repair.

Q: How long does a Thermador oven inverter board last?

A Thermador oven inverter board is designed to last the life of the appliance — typically 10 to 15 years or more with proper maintenance. Premature failure is usually caused by chronic overheating from blocked ventilation, a faulty cooling fan that has been running without replacement, or power surges. Keeping the oven's vents clean and ensuring good airflow around the unit will help maximize the board's lifespan.

Abstract

The Thermador oven error code E325 indicates that the inverter board — the component that regulates power to the oven's convection motor or cooling systems — has reached an unsafe temperature. This is a medium-severity fault that will typically shut the oven down to prevent further damage. The most common causes include a blocked cooling fan, a failing inverter board, or restricted airflow around the appliance.