CodeRegistry
Brands
  1. Home
  2. Stihl
  3. Power Tools
  4. Three flashing red lights (HSA 56)
About·Privacy·Terms

CodeRegistry — Your global library for technical solutions.

For your safety: always follow the equipment manufacturer’s official manuals. CodeRegistry is an independent help site and is not affiliated with the brands listed here.

Three flashing red lights (HSA 56)

Three flashing red lights - Internal electronic issue (HSA 56)

Stihl · Power Tools

What does Three flashing red lights (HSA 56) mean?

This signals an internal electronic problem within the HSA 56 tool. The unit needs to be opened for inspection by a qualified technician.

Common Causes

  • Failure of the electronic control board
  • Damaged internal wiring or connections
  • Faulty electronic components

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Open the HSA 56 unit for inspection as per the diagnostic steps.

  2. 2

    Carefully examine all internal wiring and connections for damage.

  3. 3

    Inspect the electronic control board for any signs of burning or component failure.

  4. 4

    Replacement of the electronic control board may be necessary.

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 133)Search more codes in this manual