Step1: Disconnect fryer power and allow cooling completely before servicing.
Step2: Open main control panel and locate interface board for access.
Step3: Label and carefully disconnect terminal connectors to avoid errors.
Step4: Remove faulty board from mounting area and housing.
Step5: Install new interface board securely ensuring correct fit.
Step6: Reconnect all terminals firmly as labeled earlier restoring configuration.
Step7: Restore power and test operation and ensure safe operation and check for faults.