Troubleshooting

Something not working as expected? Use these guides to diagnose and fix the most common aF4 issues, from blinking LEDs and power problems to feeding errors and solenoid issues.

Blinking Temperature LEDs — What They Mean

If all 5 green temperature LEDs on your aF4 are flashing simultaneously, the unit has detected a fault and is alerting you. This guide will help you identify exactly which fault you have based on when the LEDs started flashing. The timing of when the

Solenoid Failure — Symptoms and Resolutions

The solenoid is the valve at the heart of your aF4's feeding system. It controls the flow of food from the reservoir to your aquarium and manages the auto-clean cycle. When it fails, the unit may appear to run normally but food will not be delivered

Over-Temperature Fault — Remedies & Prevention(Flashing LEDs)

This guide covers everything you can do to resolve and prevent the aF4 over-temperature fault. If you haven't already, read our Blinking LED Guide first for an explanation of what the fault means and how your unit responds. If your unit has not alrea

Power Issues — Troubleshooting Guide

This guide will help you diagnose and resolve power issues with your aF4. The fastest way to identify what's wrong is to check the small red LED above the power button — it tells you immediately which type of problem you have. When the power supply i

Food Not Dispensing — Troubleshooting Guide

If your aF4 is running its feed cycle but little or no food is reaching your aquarium, this guide will help you identify and fix the cause. Most dispensing issues are related to food preparation or tubing placement and can be resolved quickly without

My aF4 Appears to Be Leaking

If you notice water pooling around the base of your aF4, don't panic — in most cases this is not a leak at all. The most common cause is an overflowing condensation drain drawer, which is a normal part of how the aF4's cooling system works. This guid