Stihl Trimmer Error Code 4 Flash: How to Fix It

Q: What does 4 flash error mean on Stihl trimmer?

The 4 flash (or 4 blink) error code on Stihl trimmers indicates a temperature sensor failure. This means the sensor cannot properly monitor engine temperature, which is critical for safe operation.

Q: Can I still use my Stihl trimmer with 4 flash error?

No, you should not operate the trimmer with a 4 flash error. The temperature sensor is essential for preventing engine overheating and damage. Continued use could result in costly engine repairs.

Q: How much does a Stihl temperature sensor cost?

A replacement temperature sensor for Stihl trimmers typically costs between $15-40 depending on the specific model. Genuine Stihl parts may cost slightly more but ensure proper fit and function.

Q: How do I reset Stihl trimmer error codes?

Stihl trimmer error codes typically reset automatically once the underlying issue is resolved. After replacing a faulty temperature sensor, start the trimmer and let it run normally - the error code should clear on its own.

Abstract

The Stihl trimmer 4 flash error code indicates a temperature sensor failure in your equipment. This error occurs when the temperature sensor cannot properly read the engine temperature, which can cause performance issues or prevent the trimmer from starting.