Get the failure in writing
Understand which component failed, why it failed and whether another condition contributed.
Review system condition
Age, coil condition, corrosion, compressor health, prior repairs and refrigerant type help establish future risk.
Consider comfort problems
Persistent humidity, noise, uneven rooms and high runtime may indicate design or duct issues that a simple equipment swap will not solve.
Compare complete scopes
A replacement proposal should address sizing, matched equipment, ducts, controls, electrical needs, drainage, startup and warranty.
When to request professional service
Request service when basic settings and an accessible filter do not explain the problem, or when the system is frozen, leaking, electrically unstable, unusually noisy or unable to maintain a safe indoor temperature.
Shut the system down for smoke, a persistent burning smell, repeated breaker trips, spreading water or severe mechanical noise. Call emergency services for fire, medical danger or another immediate threat to life or property.