Dacor Oven Error Code C33

C33 means the relay board has detected an ambient temperature above 80°C in the electronics area of the oven. As a protective response, the oven shuts down and activates the cooling fans. The oven will not operate again until the temperature around the relay board drops to 50°C. This is a thermal protection feature designed to prevent permanent damage to the control electronics.

Once the oven has cooled and the error has cleared, it is generally safe to use for a single additional cooking cycle. However, if C33 appears repeatedly, you should stop using the oven and investigate the root cause before continuing. Repeated overheating of the relay board can cause permanent damage to the control electronics, leading to more costly repairs. A technician should inspect the cooling fans and ventilation before further use if the error recurs.

Self-clean cycles run at very high temperatures for extended periods, which places maximum thermal stress on the electronics cavity. If the cooling fans are even slightly degraded, or if kitchen ventilation is poor, this extra heat load can push relay board temperatures past the 80°C threshold. Check that the area around the oven has adequate clearance and that the cooling fans are spinning freely and at full speed. Repeated C33 errors after self-clean cycles often point to a cooling fan that is beginning to fail.

The C33 condition does not clear through a simple reset while the electronics remain hot. The oven is designed to resume operation automatically once the relay board ambient temperature falls back to 50°C. Cutting power and restoring it will not bypass this requirement, as the thermal condition must physically resolve first. Allow the cooling fans to run until they stop on their own before attempting to use the oven again.

Repair costs depend heavily on the root cause. If the issue is a blocked vent or installation clearance problem, there may be no parts cost at all. A replacement cooling fan typically runs in the range of $50 to $150 for the part, plus labor. If the relay board itself needs replacement, parts alone can range from $150 to $400 or more depending on the model, with additional labor costs on top of that.