Husqvarna Automower Error Code 4: How to Fix It

Q: What causes Husqvarna Automower Error Code 4?

Error Code 4 is typically caused by boundary wire breaks, damaged loop sensors, electromagnetic interference, poor sensor contact due to dirt or corrosion, or charging station placement issues.

Q: Can I still use my Automower with Error Code 4?

No, you should not operate your Automower with Error Code 4 as it cannot properly detect the boundary wire, which may cause it to leave your property or operate unsafely.

Q: How do I find a break in my Automower boundary wire?

Use a multimeter to test continuity, visually inspect the entire perimeter for obvious damage, or use an AM radio tuned to a quiet frequency - you'll hear static near the charging station that fades where the wire is broken.

Q: How much does it cost to repair Automower Error Code 4?

DIY repairs typically cost $10-50 for wire connectors and replacement wire sections. Professional repairs range from $100-300 depending on the extent of wire damage or if sensor replacement is needed.

Q: Why does my Automower Error 4 only happen in certain weather?

Moisture can worsen poor wire connections or corroded sensor contacts. Underground wire joints may fail when wet, and electromagnetic interference from other devices can vary with humidity and temperature changes.

Abstract

Husqvarna Automower Error Code 4 indicates a loop sensor malfunction affecting the front, rear, or side detection sensors. This prevents your mower from properly detecting the boundary wire, causing navigation issues and potential safety concerns.