Signs your AC is failing
Common signs an AC is failing: warm air from vents, the system running constantly without reaching the set temperature, ice on refrigerant lines, water around the indoor unit, loud buzzing or grinding, short cycling, and rising electric bills. A system over 10 to 15 years old with these signs is worth a repair-or-replace assessment.
What each sign usually means
| Sign | Likely cause | What to do |
|---|---|---|
| Warm air | Refrigerant leak, compressor or capacitor | Check breaker and thermostat, then call a pro |
| Ice on lines | Dirty filter, low airflow or low refrigerant | Turn off cooling, run fan to thaw, replace filter |
| Water at indoor unit | Clogged condensate drain | Turn off, call for drain service |
| Buzzing or clicking outdoors | Electrical part (contactor, capacitor) | Turn off at thermostat; call a pro |
| Short cycling | Oversizing, thermostat or refrigerant issue | Professional diagnosis |
| Rising bills | Lost efficiency, dirty coils, duct leaks | Tune-up; compare repair vs replace |
Next: Repair vs replace: the $5,000 rule.
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Questions
How long does an AC last in Texas?
Many systems are replaced somewhere in the 10 to 15+ year range, depending on maintenance and use; heavy Texas cooling loads add wear.
More guides
- AC replacement cost in Texas (2026)
- Repair vs replace: the $5,000 rule
- SEER2 requirements in Texas (DOE 2023 South region)
- How to check an HVAC contractor's TDLR license
- Heat pump vs furnace in Texas
- Texas HVAC rebates and tax credits 2026
- Emergency AC repair: what to do first
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