Diagnosis
Yeah, this one's common. "PF" stands for Power Failure. The dryer's electronics detected a brief interruption or surge in your home's power, and it's locked up as a safety precaution. It's not a hardware failure, just the control board being overly cautious.
How to Fix It
You need to do a full reset. Unplug the dryer from the wall outlet. Don't just turn it off at the breaker or cycle the power button—you need to physically unplug it. Wait a full 60 seconds. This lets the control board's memory fully clear. Then plug it back in. The "PF" message should be gone, and you can restart your cycle normally.
If That Didn't Work
If "PF" comes back immediately or very soon after resetting, you likely have an unstable power supply to that outlet. Try plugging something else (like a lamp) into the same outlet to see if it flickers. The issue might be with your home's electrical circuit, not the dryer.
Heads Up
If you get frequent "PF" errors, consider plugging the dryer into a different, dedicated outlet if possible, or have an electrician check the circuit. Using an extension cord or a heavily shared circuit can cause these glitches.