5 Signs Your AC Is About to Fail (Before It Leaves You Without Cooling)
Air conditioners almost always warn you before they quit. Here are the five signals Central Florida homeowners should never ignore — and what each one usually means.
Most air conditioners do not die without warning. They spend weeks telling you something is wrong, and the warning gets ignored because the house is still cooling — right up until the afternoon it is not. Here are the five signs worth acting on.
1. Runtime keeps getting longer
If your system used to cycle off in the afternoon and now runs nearly continuously to hold the same temperature, capacity is dropping. Common causes: low refrigerant from a slow leak, a dirty condenser coil, or a compressor losing efficiency. In Orlando summers, a system that cannot cycle off is a system on borrowed time.
2. The house cools but still feels clammy
Cooling and dehumidifying are two different jobs. When indoor humidity creeps above about 55% while the thermostat is satisfied, the system is usually oversized, short-cycling, or losing charge. Sticky air at setpoint is one of the most reliable early failure signals in Florida.
3. New noises
- Grinding or screeching: blower or compressor bearings
- Clicking that repeats before startup: a failing capacitor or contactor
- Buzzing at the outdoor unit: electrical fault — shut it off and call
Capacitors are cheap to replace on a scheduled visit and expensive to replace at 9pm on a Saturday.
4. Rising power bills with no change in habits
Compare this month to the same month last year. A 20% jump with the same thermostat setting and similar weather means the system is working harder for the same result.
5. Water where water should not be
Moisture around the indoor unit, a wet ceiling stain, or a safety float switch that keeps shutting the system down all point to a clogged condensate drain. This is the failure mode most likely to cause expensive secondary damage.
When repair stops making sense
If the system is over 12 years old, needs a repair worth more than a third of a replacement, or has had multiple refrigerant top-offs, replacement is usually the better investment. We walk homeowners through both paths honestly — see AC installation or call for emergency HVAC service if you are already down.