What are you noticing?
Warm air, weak airflow, frequent cycling, unusual noises, and uneven room temperatures are useful details to share. Note when the issue began and whether it affects the whole home or individual rooms.
Before the visit
Check the thermostat mode and look at an accessible filter, following the equipment instructions. Keep supply and return vents unobstructed. If a breaker repeatedly trips, leave the equipment off and arrange professional service.
What to ask during the assessment
Ask about the cause, repair scope, equipment condition, and a written estimate. Refrigerant, electrical components, and sealed equipment require professional attention.