Signs Your AC Needs Repair
Most air conditioning failures announce themselves before they strand you. Catching those signals in April is considerably cheaper and less stressful than discovering them during the first 98°F week of the summer.
Here is what to pay attention to.
Run times are creeping up
If the system now runs noticeably longer to hold the same setpoint as last year, capacity is slipping. Common reasons are coil fouling, airflow restriction, and slow refrigerant loss.
Airflow feels weaker at the vents
Reduced airflow is an early indicator of filter restriction, a dirty blower wheel, or duct problems, and it eventually leads to coil freezing.
New sounds
- Buzzing at the outdoor unit — often a weakening capacitor
- Squealing or rubbing indoors — blower motor or wheel
- Clicking that repeats without a start — control or contactor
- Hissing near the lines — possible refrigerant leak
The house is humid even when it is cool
Reduced dehumidification often shows up before reduced cooling. It points to airflow, charge, or coil condition.
Odors
A musty smell at startup suggests biological growth on the coil or in the drain pan. A burning or hot-plastic smell is a stop-and-shut-off situation.
Bills rising without a habit change
Comparing this summer's usage to the same months last year is a reasonable proxy for system efficiency, as long as the weather was broadly comparable.
Water where it should not be
Any water around the indoor unit, in the emergency pan, or staining a ceiling deserves attention before it becomes drywall repair.
Frequently Asked Questions
How do I know whether to call now or wait?
Call promptly for burning odors, breaker trips, water intrusion, ice, or grinding noises. Weak cooling, rising run times, and humidity changes are worth scheduling soon but are not usually emergencies.
Related residential AC services
AC Repair
Diagnosis and repair help for home cooling systems that are underperforming, short cycling, or shut down entirely.
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Seasonal service that keeps airflow, drainage, and electrical components ahead of failure.
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Buzzing, screeching, rattling, clicking, or banging from indoor or outdoor equipment.
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Water around the indoor unit or a ceiling stain below an attic air handler.
Read moreNeed AC Help Tonight?
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