AC Repair in Louisville, KY

What an air conditioning repair visit typically covers

• Cooling performance checks, including temperature split across the indoor coil
• Refrigerant pressure readings and leak investigation when charge is low
• Capacitor, contactor, and relay testing, plus replacement of failed parts
• Condenser and evaporator coil inspection and cleaning
• Blower motor, wheel, and filter airflow troubleshooting
• Condensate drain clearing and float switch verification
• Thermostat, wiring, and control board diagnosis
• Frozen coil and airflow restriction troubleshooting

Common reasons an air conditioner stops cooling

Most cooling failures trace back to electrical parts, airflow, or refrigerant. Knowing which category a system falls into changes the repair completely, which is why measurement comes before parts.

• Failed run capacitor, so the compressor or condenser fan hums but will not start
• Refrigerant loss from a leak in the coil, lineset, or a fitting
• Dirty condenser or evaporator coil reducing heat transfer
• Restricted filter or duct problem starving the system of airflow
• Clogged condensate drain tripping the safety float switch
• Worn blower motor, failed capacitor, or a control board fault
• Thermostat wiring, staging, or configuration issues
• Tripped breaker or damaged disconnect and whip wiring outdoors

Repairing versus replacing an older system

There is no single rule for when repair stops making sense, but a few factors carry most of the weight: the age of the equipment, whether the failure is a component or the compressor itself, the refrigerant the system uses, and how the repair cost compares with the value of the remaining service life.

Systems built for R-22 are a common example. That refrigerant is no longer produced, so recharging an older leaking unit is usually a short-term fix, and a leak repair on a corroded coil often is too. Newer systems using R-410A or R-454B are generally worth repairing when the rest of the equipment is sound. The right answer depends on the specific system, and it should be explained with the readings that led to it.

Worth checking before you call

A few of these solve the problem outright, and the rest give a technician a useful head start.

• Confirm the thermostat is set to cool, the fan is on auto, and batteries are good
• Check the breaker for the indoor and outdoor units
• Look at the air filter and replace it if it is loaded with dust
• Make sure the outdoor unit is clear of grass clippings, leaves, and mulch
• Check for water in the emergency drain pan or a tripped float switch
• If the coil or lineset is covered in ice, turn the system to fan-only so it can thaw

Signs a cooling system needs attention

• Air from the vents is cool but never cold enough to reach the setpoint
• The system runs continuously on moderate days
• Short cycling, or repeated starts and stops within a few minutes
• Ice on the refrigerant lineset or indoor coil
• Water pooling near the indoor unit or in the drain pan
• Humming, buzzing, or a hard start at the outdoor unit
• Indoor humidity climbing even while the system runs
• Musty or burning smells when the system starts

Common questions

Why is my AC running but not cooling?

The most common causes are a failed capacitor, low refrigerant from a leak, a dirty coil, or an airflow restriction such as a heavily loaded filter. Each produces different pressure and temperature readings, which is how a technician tells them apart.

How often does an air conditioner need refrigerant?

It should not need any. Refrigerant circulates in a sealed system and is not consumed. If a system is low, there is a leak, so the useful question is where the leak is and whether repairing it makes sense for that equipment.

Why does my air conditioner freeze up?

Ice usually points to low airflow or low refrigerant. Dirty filters, a blocked return, a failing blower, or a plugged coil restrict airflow, while a refrigerant leak drops coil temperature below freezing. Running the system in fan-only mode lets the ice thaw before diagnosis.

Is it worth repairing an air conditioner over ten years old?

Sometimes. A capacitor or contactor on an otherwise healthy system is usually worth fixing. A leaking coil or failed compressor on older R-22 equipment is where replacement often makes more sense. The age, refrigerant type, and specific failure all matter.

Do you repair light commercial cooling equipment too?

Yes. Along with residential systems, rooftop units and light commercial split systems for offices, retail spaces, and mixed-use buildings are part of regular work.