Frigidaire refrigerator alarms always come with an error code. Whenever you hear the fridge beeping, a code will appear on the display to make it easier for you to identify the alarm. More importantly, it allows you to respond faster to the issue and prevent further problems. Here are the different alarms and their corresponding codes. • Door Ajar alarm: Door Ajar • Power Failure alarm: Power Failure or PF • Flapper alarm: DI SP • Sabbath mode: SB or Sb • High Temp alarm: H, Hi, or H1