What the appliance detected
Detected condition
Amana states that PF or a flashing colon indicates a power failure or that the clock time has been turned off on applicable models.
What may contribute
Possible causes
- A recent power failure may have interrupted the microwave clock.
- The time-of-day clock may have been turned off or may need to be reset.
- A persistent flashing display may point to an external electrical-supply issue that should be evaluated by a qualified electrician.
Start conservatively
Safe preliminary checks
Work in order and stop whenever a step is not supported by the documentation for your model.
Record the display and confirm the model
- Photograph or write down the exact display before changing anything: PF, FLASHING :.
- Confirm the complete Amana model number and compare the display with the owner documentation for that exact microwave because code sets vary by platform.
Clear the power-failure indication
- On applicable models, touch Cancel/Off or Cancel to stop the blinking indication.
- Reset the time-of-day clock if your model requires it after a power interruption, using the owner manual for the exact control sequence.
Watch for a persistent or repeating power problem
- If the display clears and the microwave otherwise operates normally, no internal repair is indicated by PF alone.
- If PF or the flashing colon keeps returning without a known outage, stop repeated resets and have the home electrical supply evaluated by a qualified electrician as Amana recommends.
Actions not recommended
- Do not remove the outer cabinet, control panel, vent housing, waveguide cover, or any service panel to chase a display code.
- Do not touch or test the high-voltage capacitor, transformer, inverter, magnetron, internal fuse, interlock wiring, control boards, sensors, thermistors, relays, or internal harnesses.
- Do not bypass, tape, bridge, defeat, or adjust the door-interlock system, and do not operate the microwave with a damaged or misaligned door.
- Do not perform live-voltage, continuity, resistance, capacitor-discharge, or internal connector tests as an owner troubleshooting step.
- Do not replace a keypad, sensor, thermistor, control board, relay board, switch, or other internal part from a display code alone.
When to stop and request service
- Contact a qualified electrician if PF or the flashing colon continues to flash or repeatedly returns without a known power interruption.
- Arrange qualified microwave service as well if the unit also shows smoke, a burning odor, repeated arcing, visible door damage, or a repeated breaker trip.
Documented source
Official information reviewed
Our summary is based on manufacturer support material and stays within the limits of that material.
Amana Product Help
Flashing ":" or PF in display - Over-the-Range Microwave
Source reviewed by Appliance Help HQ: September 24, 2026.
Appliance Help HQ is an independent informational site and is not affiliated with or endorsed by Amana.
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