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3 glowing red lights

3 glowing red lights — Power tool too warm

Stihl · Power Tools

What does 3 glowing red lights mean?

The power tool has overheated due to prolonged or heavy use. The tool's internal system is preventing operation to avoid damage.

Common Causes

  • Tool overheating from heavy use
  • Blocked air vents on the tool

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Stop using the tool and allow it to cool down.

  2. 2

    Ensure that the tool's air vents are clear of debris.

  3. 3

    Resume use after the tool has cooled sufficiently.

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 116)Search more codes in this manual