Fisher & Paykel oven Error Code F4: Power Module Failure

1. SAFETY: Disconnect power before inspecting this appliance.
2. Switch the oven off at the wall and wait 5 minutes, then restore power — a one-time power glitch can sometimes cause a false F4.
3. If F4 returns, switch off at the wall and call a Fisher & Paykel service technician.
4. Do not continue using the oven with a power module fault — uncontrolled heating is possible.

The oven's power module — the board that controls the heating elements — has detected an internal fault. The oven will not heat until the module is repaired or replaced.

Fisher & Paykel oven warnings like this often appear after interrupted heating, control resets, sensor mismatch, or a fault that returns during warm-up rather than during a stable cook cycle.

• Assuming the display code proves one exact failed part before the safe first checks are done.
• Restarting the appliance repeatedly instead of confirming whether the same fault returns after one clean recovery attempt.

• Failed power relay on the board - Relays switch the heating elements on and off; a failed relay prevents heating or causes uncontrolled heating.
• Burned or shorted triac - The triac that controls element current can fail after sustained high-current operation.
• Power surge damage - A voltage spike can damage power module components.

• Use a surge protector or whole-home surge suppressor to protect appliance electronics from voltage spikes.

If the same warning returns after the first safe checks, or the next step would require invasive disassembly, stop there and move to model-specific guidance or service.