Autocheck 3 Husqvarna -

If you run three times, and each time you get a different fault code (e.g., 2 red, then 4 red, then no lights), you likely have a failing ECU or a chewed wiring harness (rodents love soy-based wires).

If you take your machine to an authorized dealer, this is what they will use the software to do: autocheck 3 husqvarna

Buy a spare keypad membrane and keep a printed PDF of the Autocheck 3 flash code chart (available on Husqvarna’s dealer portal) inside your toolbox. When your saw starts acting up, hold that “I” button and let the machine tell you exactly what is wrong. If you run three times, and each time

For homeowners, the Autocheck 3 offers a reliable and easy-to-use solution for occasional woodcutting tasks. Its ergonomic design and intuitive controls make it accessible to users with varying levels of experience, while its robust construction and durable components ensure years of trouble-free operation. For homeowners, the Autocheck 3 offers a reliable

| Flash Pattern | Meaning | Most Likely Fix | | :--- | :--- | :--- | | | Low battery voltage (on heated handle models or battery-assist start). | Charge the battery overnight. If problem persists, replace the battery. | | 3 red flashes | Charging circuit fault (alternator/stator not sending voltage to ECU or battery). | Check stator windings and cables. Potential stator replacement. | | 4 red flashes | Temperature sensor out of range (ECU sees -30°C or +150°C). | Replace the temperature sensor. This often means a new ECU or wiring harness. | | 5 red flashes | Throttle stop or trigger position sensor failure. | The ECU cannot read idle vs. full throttle. Clean throttle linkage; replace sensor/trigger assembly. | | 1 long red + 1 green | Decompression valve stuck or not seated. | Replace the decompression valve on the cylinder. | | Constant red LED (no flash) | Major ECU fault or fuel pump failure (on electronic fuel injection). | Requires dealer service with Husqvarna Diagnostic Tool (HDS). |