Safety: Disconnect power before removing interior panels or working near moving parts.

F18 is associated with the air damper that regulates airflow between compartments.

Locate damper: The damper is typically behind a cover between the freezer and fresh food compartments. Remove shelves and the cover to access it.
Check for obstructions: Look for food packages, ice, or debris blocking the damper door. Clear any obstructions carefully.
Inspect damper movement: Gently move the damper door by hand (if possible). If it is jammed or the foam seal is torn, the assembly may need replacement.
Listen for operation: When powered, you may hear the damper motor open/close. If silent and F18 is present, the motor or wiring may be faulty.
Replace damper assembly: If the motor is not operating or the door is broken, install a new Fisher & Paykel damper assembly. Ensure seals are correctly positioned to prevent air leaks.
Control board: If a new damper does not resolve F18, the control output may be defective and should be checked by a technician.

Display shows F18; refrigerator may be unusually noisy or may not cool efficiently.

Possible Causes