Wolf Oven Error Code Left Convect Fan triac open

The "Left Convect Fan triac open" error indicates that the triac controlling the left convection fan on the relay module is in a failed open state. A triac is a bidirectional semiconductor switch used to control AC power delivery to the convection fan motor. When the control board commands the fan to run, it sends a signal to the triac on the relay module, which should close the circuit and supply power to the motor. A triac stuck open means the switch cannot close, so the fan motor receives no power regardless of the command signal sent by the control board.

This fault is detected when the oven's control system expects the left convection fan to be operating but receives feedback indicating the fan circuit is not completing. The relay module in Wolf ovens handles switching functions for multiple components, and a failed triac on this board breaks the electrical path to the left fan motor entirely. The convection system depends on this fan to circulate heated air evenly through the oven cavity, so a triac open fault will degrade or disable convection cooking performance on the left side of the oven.

Common causes include a triac that has burned out due to electrical stress or age, a loose or corroded wiring connection between the control board and the relay module, or damage to the relay module itself. Because the triac is integrated into the relay module, the component-level fix is replacement of the entire relay module rather than individual triac replacement. Inspecting wiring harness connections at the relay module should always be performed first, as a poor connection can mimic a failed triac.