Evidence hierarchy
Model-specific manuals, official support documents, safety notices, and manufacturer instructions take priority. General diagnostic reasoning is used only where it does not conflict with product documentation.
Page structure
Each guide should identify the likely meaning, list observable causes, order checks from low risk to higher complexity, and state when the user should stop.
Safety
Guides do not instruct unqualified users to open mains-powered equipment, handle refrigerant, bypass interlocks, work near live circuits, or continue when heat, smoke, leaks, swelling, or structural damage is present.
Updates and corrections
Pages include an update date. Material corrections should be made promptly and should not preserve outdated advice for traffic reasons.
Commercial independence
Future advertisements or affiliate links must be visually separated from editorial guidance. Commercial relationships do not determine the diagnosis or the order of checks.