Editorial Policy: How We Check Facts

Manuals first. A page about an error code exists only if the meaning is stated in a manufacturer document — an operation manual, service manual or official support page. Each page lists the documents used. Where the manual does not state something (a wait time, a blink count, a price), the page says so.

Australian law on every page. Refrigerant work requires an ARC-licensed technician, electrical work behind a cover requires a licensed electrician, and gas work requires a licensed gas fitter. Our content stops at what can be checked from outside the equipment with the power off. We do not describe opening covers, testing terminals or relighting anything the manual reserves for a qualified person.

No invented experience. We do not write "when I fixed mine" stories. We do quote the manuals, and we do explain what installers commonly do where that is clearly labelled as practice rather than a manufacturer instruction.

Costs. Call-out and repair figures appear only when attributed to a named Australian source and date. No manufacturer publishes call-out fees; we never attribute a price to one.

Dates. "Last updated" is when the text changed. "Last checked" is when the facts were verified against the sources listed. Pages are re-checked at least every twelve months, when a manufacturer revises a manual, or when a reader reports a discrepancy.

Calculators. Every calculator has a methodology page with the formula, the data table, the sources and the date, and a test set that the build must pass. Rules of thumb are labelled as rules of thumb.

Advertising and affiliate links are marked and do not influence which pages are written or what they say.