Safety first: Turn off power at the breaker and allow the oven to cool before accessing internal components.

Check fan operation: During a bake cycle, you should hear the internal cooling fan running. If you never hear it, the fan motor or its control circuit may be faulty.
Inspect vents: Ensure front and rear ventilation openings are not blocked by cabinetry, foil, or debris. Clear any obstructions.
Access fan assembly: Remove the rear panel (for wall ovens, you may need to pull the unit out) to access the cooling fan. Check for seized blades, obstructions, or signs of overheating.
Test fan motor: With power disconnected, check the fan motor for continuity using a multimeter. An open motor should be replaced. Also inspect the high-limit thermostat in series with the fan, if present.
Control board relay: If the fan motor and thermostat test good, the control board may not be energizing the fan relay and will likely need replacement.

Warning: Do not operate the oven with a non-functioning cooling fan; this can overheat electronics and surrounding cabinetry.

Dacor oven shows F8 and may not heat or may shut down during use.

Possible Causes