Common AC repair symptoms
Typical warning signs include warm air from the vents, weak airflow, frequent cycling, ice on the indoor or refrigerant lines, unusual noise, water where it should not be, or a system that will not start.
What you can check first
Confirm the thermostat is set correctly, the breaker has not tripped, accessible filters are not badly clogged, and supply or return vents are not blocked. Avoid opening electrical compartments or attempting refrigerant work.
When professional diagnosis makes sense
Call when basic checks do not restore normal cooling, the problem repeats, the system shuts down, or you notice unusual odors, electrical symptoms, or ice buildup. A technician can test the system rather than replacing parts by guesswork.
Safety note: If you smell gas, see smoke or fire, suspect carbon monoxide, or believe there is an immediate safety danger, leave the area as appropriate and contact the relevant emergency or utility service. Do not treat an active safety emergency as a routine HVAC appointment.