HVAC not heating or cooling: safe information to collect

Collect useful symptoms and model information without opening equipment or guessing a repair.

Start with what you can observe from normal occupied areas: the thermostat mode and displayed temperature, when the concern occurs, which rooms are affected, and any exact error code. Record the brand and full model from a safely visible label. Do not remove electrical covers or reach inside equipment.

Use the operation manual for your exact model. Similar-looking codes can belong to different systems. This hub has a small verified code library; an unsupported combination returns unknown and a manufacturer resource link. A code describes a reported condition, not a confirmed failed part.

If equipment leaks water, produces a burning smell or behaves abnormally, follow its owner manual and seek qualified help. Do not attempt wiring, refrigerant or gas work. Keep your observations in My HVAC so a professional can review the history alongside the manual.

Sources you can check

• Daikin FTX / FTXB / FTK / FTKB-B operation manualDaikin · checked 2026-09-28 · 3P601789-2 E

Continue with your home

Keep the equipment labels and supporting documents in one home passport, or explore costs using your own quotes. This public website is a browser-local planning preview; no live AI diagnosis, installation booking, order or notification is performed.