Stihl HSA 66 User Manual (English)

Questions and Answers:

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amandalopezSep 12, 2025
What to do if LED on Stihl Trimmer charger flashes red?
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  Jason TranSep 12, 2025
  If the LED on your Stihl Trimmer charger flashes red, it could be due to a few reasons. First, try removing and refitting the battery to ensure there's proper electrical contact between the charger and battery. If four LEDs on the battery flash red for about 5 seconds, take the battery out and refit it. If the LEDs continue to flash, the battery is faulty and needs replacing. If these steps don't resolve the issue, the charger itself may be faulty and should be checked by a servicing dealer.
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Kaitlyn BarnettAug 26, 2025
Why does my Stihl HSA 66 Trimmer cut out during operation?
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  kgouldAug 27, 2025
  Your Stihl Trimmer might cut out during operation due to the battery or machine's electronics overheating; in this case, remove the battery and allow both to cool down. Another cause could be an electrical or electromagnetic malfunction. To resolve this, remove the battery and then refit it.
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Dominique BlakeAug 27, 2025
Why my Stihl HSA 66 Trimmer does not start when switched on?
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  Austin LittleAug 27, 2025
  There are several reasons why your Stihl Trimmer might not start when switched on. It could be due to a low battery charge, which requires a recharge. Alternatively, the battery might be too hot or too cold, needing time to adjust to a moderate temperature. A malfunction in the hedge trimmer itself, or the cutting blades not moving freely, can also prevent it from starting. Other potential causes include the trimmer overheating, a battery malfunction, poor electrical contact between the trimmer and battery, or dampness affecting either the trimmer or the battery.
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Melanie LopezAug 29, 2025
What to do if Stihl HSA 66 runtime is too short?
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  Warren SampsonAug 29, 2025
  If your Stihl Trimmer's runtime is too short, it could be due to a battery that is not fully charged; recharge it fully. Alternatively, the normal battery life may have been exceeded, indicating it's time to replace the battery.
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Timothy WaltersAug 30, 2025
Why is the runtime of my Stihl HSA 66 so short?
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  Daniel SingletonAug 31, 2025
  A short runtime on your Stihl Trimmer can stem from several causes: the battery may not be fully charged, so ensure you charge it completely. The battery's useful life may have been reached or exceeded, requiring a check and possible replacement. Sticking or dirty blades can also reduce runtime; clean the blades and spray them with STIHL resin solvent. Finally, bent blades can impact performance; have them checked by a servicing dealer.
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Douglas VillarrealSep 1, 2025
Why is the running time of my Stihl HSA 66 too short?
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  Amy PattersonSep 1, 2025
  If the running time of your Stihl Trimmer is too short, it could be due to several reasons. The battery may not be fully charged, so ensure you charge it completely. The battery's useful life might also be reached or exceeded, requiring a check and possible replacement. Additionally, check if the blades are sticking or dirty; if so, clean them and spray with STIHL resin solvent. Bent blades can also cause this issue, so have them checked by a servicing dealer.
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Mary BrownSep 14, 2025
Why is my Stihl HSA 66 Trimmer battery not being charged even though the LED on the charger glows green?
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  Steven BatesSep 14, 2025
  If your Stihl Trimmer battery isn't charging despite the green LED on the charger, it might be too hot or too cold (one LED on the battery glows red). Allow the battery to cool down, or if it's too cold, let it warm up slowly to about 60°F - 70°F (15°C - 20°C). Ensure you operate the charger in closed, dry rooms at ambient temperatures between 40°F - 105°F (5°C - 40°C).
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Sean AguilarSep 12, 2025
How to fix a Stihl HSA 66 Trimmer when 1 LED is flashing green?
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  Charles HigginsSep 12, 2025
  If 1 LED is flashing green, it means the battery's charge is too low. Charge the battery as described in the User Manual for chargers STIHL AL 101, 300, 500.
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qhernandezSep 7, 2025
Why is 1 LED emitting a red light on my Stihl HSA 66 Trimmer?
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  tyler13Sep 7, 2025
  If 1 LED emits a red light, it indicates that the battery is either too warm or too cold. Remove the battery and allow it to cool down or warm up.
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Joseph SchultzSep 9, 2025
What does it mean when 3 LEDs flash red in the Stihl HSA 66 Trimmer?
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  Michael KellySep 9, 2025
  If 3 LEDs flash red, it indicates a malfunction. Remove the battery. Also, clean the electrical contacts in the battery compartment.