husqvarna · Workshop manual
The machine unexpectedly shuts down as soon as the parking brake is released. This indicates a potential safety system issue, likely related to the seat switch or the parking brake switch.
Click steps to track your progress.
Check the seat switch and its connector. With no one in the seat, the resistance should be low and high when someone is in the seat. Replace if necessary.
Inspect the P-brake microswitch for proper operation and replace if faulty.
If the issue continues, contact a service professional.