Husqvarna Automower Error Code 18: How to Fix It

Q: What causes Husqvarna Automower Error 18?

Error 18 is caused by a malfunctioning front collision sensor or bumper switch. This can result from physical damage, water infiltration, worn mechanical components, or electrical connection issues.

Q: Can I still use my Automower with Error 18?

No, you should not operate the Automower with Error 18. The collision sensor is a critical safety feature that prevents damage to the mower and surrounding objects. Continued use without a working sensor risks serious damage.

Q: How much does a Husqvarna collision sensor replacement cost?

Replacement collision sensor assemblies typically cost between $30-80 depending on your specific Automower model. Check with Husqvarna dealers or authorized parts suppliers for exact pricing.

Q: How often should I replace the collision sensor on my Automower?

Collision sensors don't have a set replacement schedule and should last several years under normal conditions. Replace only when Error 18 appears or if you notice the bumper isn't responding to obstacles during operation.

Q: Will Error 18 come back after replacing the collision sensor?

If you install a genuine Husqvarna replacement part correctly, Error 18 should not return. If the error persists, there may be wiring issues or problems with the main control board requiring professional diagnosis.

Abstract

Husqvarna Automower Error Code 18 indicates a collision sensor problem with the front bumper switch. This critical safety component detects obstacles and stops the mower from damage, so immediate replacement is necessary to restore safe operation.