Have these details ready
Say whether cooling stopped suddenly or declined, whether ice is visible and whether all rooms are affected. Share nameplate information only if you can read it safely.
Confirm the receiving company
Ask it to identify itself, explain any visit fee and confirm it handles your system. Ask about the appropriate certification for refrigerant work.
Before booking
Confirm timing, access, estimate and cancellation or diagnostic fees. Do not authorize an open-ended refill before assessment.
Not an emergency service
For smoke, fire or another immediate danger, leave the area and use the appropriate emergency service. This is not an emergency dispatch line.

Sources behind this guide
General guidance, not a diagnosis of your equipment.
