Gaggenau Oven Error Code F 73

F 73 indicates that the N-relay, designated REL 11, is defective and sticking closed, causing an all-pole disconnection failure. This relay is responsible for fully cutting power to the oven when it is switched off. When the relay sticks, the oven cannot complete a proper all-pole disconnection, which the control system detects and flags. The relay control and power electronics module must be replaced to resolve this fault.

It is not recommended to continue using the oven while F 73 is active. A sticking all-pole disconnection relay means the oven may remain partially energized even when it appears to be off, which is a safety hazard. Discontinue use and have the unit serviced before operating it again.

The repair cost for F 73 depends on the price of the relay control and power electronics module plus labor charges. Module replacement on a Gaggenau oven typically falls in the range of $300 to $700 or more, depending on the specific model, part availability, and regional labor rates. Getting a diagnostic estimate from an authorized service provider before committing to the repair is advisable.

Resolving F 73 requires replacing the relay control and power electronics module, which involves working with high-voltage components inside the oven. This repair is best performed by a qualified appliance technician who can safely access internal components and verify correct installation. A technician should also inspect the heating elements and wiring for any underlying issues that may have caused the relay to fail.

A power cycle or reset is unlikely to permanently clear F 73 because the fault is caused by a physically defective relay with stuck contacts. The relay cannot correct itself through a reset. Even if the code clears temporarily, it will return because the underlying hardware fault in the REL 11 relay remains.