What PF Means
Whirlpool explains that when power is first supplied to the microwave, a colon blinks in the display, and that a flashing "0:00" means there has been a power failure and the clock needs resetting. PF carries the same meaning on models that show it.
Common Causes of PF
- Household power interruption
- Breaker tripped and reset
- Loose outlet or connection causing brief dropouts
🔧 One Safe Check You Can Try
Set the clock using your model's procedure and the flashing stops. If this happens repeatedly without household outages, look at the supply: an over-the-range microwave should be on a correctly rated outlet, and a loose connection or a shared circuit can cause brief dropouts. Repeated unexplained power loss is worth an electrician's attention rather than repeated clock-setting.
⚠ Why You Shouldn't Go Further Than That
- None for setting the clock.
- Outlet and circuit faults belong to a qualified electrician.
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.