What F4 Means
F4 on the oven side of a Fisher & Paykel range means a problem occurred in the power module - the board that switches the heating elements and the door lock. F&P's documented steps are to verify all the connections to the power and clock modules first, and to replace the power module only if the problem persists after that.
Common Causes of F4
- A failed power module
- A connection lost between the power module and the clock module
- Surge or supply damage to the module
🔧 One Safe Check You Can Try
Switch the range off at the breaker for two minutes and restore power once. A module problem that clears and stays away was transient; one that reappears immediately is the real thing.
⚠ Why You Shouldn't Go Further Than That
- Isolate the range at the breaker before the rear panel is opened, because the power module terminals carry the full element supply.
- F&P puts connection checks ahead of replacement for this code, and reversing that order is how an expensive board gets fitted to cure a loose plug.
- On a range the same module area serves both the oven and, on many builds, the cooktop controls, so a connector disturbed while working there can take out a function that was fine.
- Reaching the module means pulling the range clear of the wall past its anti-tip bracket, and that bracket must be re-engaged afterwards.
Opening a panel to inspect or repair something yourself doesn't automatically cancel your manufacturer's warranty — but it can risk accidental damage, and some manufacturers do have specific service conditions. Check your product's warranty terms, or ask us, before deciding.