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3 glowing red LED

3 glowing red LED - Tool is too warm

Stihl · Power Tools

What does 3 glowing red LED mean?

The tool itself has become too warm during operation. This is a safety feature to prevent overheating and potential damage.

Common Causes

  • Extended use of the tool without breaks
  • Overexertion of the tool on a difficult task
  • Blocked vents preventing proper cooling

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Stop using the tool immediately and allow it to cool down to room temperature.

  2. 2

    Check that the tool's air vents are clear of debris and not blocked.

  3. 3

    Reduce the intensity or duration of use on demanding tasks.

  4. 4

    Ensure the cutting attachment is sharp and moving freely to reduce motor strain.

Browse all codes in this manual (35)
Verified technical data. Last updated: April 2026

Related Faults

1 glowing red LED1 glowing red LED - Battery too hot or too cold1 glowing red light1 glowing red light — Battery too hot or too cold3 flashing red LED (AK Series)3 flashing red LED - Internal electronic issue (AK Series)
Source: Stihl Power Tools
Open Manual (Page 118)Search more codes in this manual