How do I handle disputes about hidden defects after purchase?

Document the defect ("fel") thoroughly with photos and written description. File a written complaint ("reklamera") with the seller as soon as you discover it – a reasonable time is usually within a few months. Hire an inspector ("besiktningsman") to assess whether the defect should have been discovered during inspection ("besiktning"). Hidden defects insurance ("dolda-fel-försäkring") (taken out by seller) can cover some costs if available. If the seller disputes responsibility, you may need a lawyer ("jurist") and possibly court. Always document everything and act quickly.