⚠
warning Petsafe
Error Code 3 blinks
Low battery indicator — batteries need to be replaced soon.
? What Causes This
Batteries nearing end of life.
✓ How to Fix It
1. Replace the batteries with 4 high quality alkaline AA batteries (LR6)
Source: page 7 of the official manual
From the manual
This error code appears in:
Petsafe Ppa44 16427 Microchip Cat Flap