30+
Years Of Experience
When Your Air Conditioner Stops Working Right
AC Repair in Lexington for frozen coils, airflow restriction, and worn capacitors
High heat and frequent use in Lexington push air conditioning systems hard, and that strain shows up in predictable ways: evaporator coils freeze over, airflow slows to a trickle, or capacitors wear out and stop the compressor from starting. White Knoll Heating and Cooling handles AC repair for systems that still run but fail to cool properly, make unusual sounds, or cycle on and off without keeping indoor temperatures stable. When refrigerant levels drop or a blower motor struggles, those problems compound quickly in summer heat and lead to total system failure if left unaddressed.

AC repair identifies why a system stopped performing and restores the failed component, whether that means replacing a capacitor that no longer holds a charge, cleaning coils caked with dirt and pollen, or locating a refrigerant leak and sealing it before recharging the system. The work varies depending on what failed, but it always starts with isolating the problem rather than guessing at parts.
Schedule a diagnostic visit to determine what stopped working and what it will take to get your system running correctly again.
Signs You Need AC Repair and What We Check
You need AC repair when your system runs continuously without lowering the temperature, when ice forms on the refrigerant lines or evaporator coil, when airflow from the vents drops noticeably, or when the unit shuts off within minutes of starting. These symptoms point to specific failures: a frozen coil usually means restricted airflow or low refrigerant, weak airflow indicates a failing blower motor or clogged filter, and short cycling often traces back to a bad capacitor or overheating compressor.

During a repair visit, White Knoll Heating and Cooling checks refrigerant pressure with gauges to confirm whether the system is low or overcharged, inspects the evaporator and condenser coils for dirt buildup that blocks heat transfer, tests capacitors with a multimeter to verify they're holding the correct voltage, and measures airflow at the supply vents to identify blower or ductwork issues. Once the cause is clear, you get a detailed explanation of what failed, what the repair involves, and whether the rest of the system is likely to hold up or if replacement makes more sense given the age and condition of the equipment.
Some repairs buy you several more years of reliable cooling, while others serve as temporary fixes on systems already near the end of their functional lifespan. A capacitor replacement on a three-year-old unit is straightforward and cost-effective, but the same repair on a fifteen-year-old system with a rusted cabinet and a compressor that runs hot may only delay a breakdown by months. Understanding where your system stands helps you decide whether to invest in the repair or plan for replacement before the next cooling season.
What Property Owners Ask About AC Repair
Homeowners in Lexington often ask similar questions before scheduling AC repair work, especially when they're weighing repair costs against replacement or trying to understand what went wrong.
What actually gets checked during an AC repair visit?
The technician tests refrigerant levels with manifold gauges, inspects both coils for dirt or damage, checks electrical components including the capacitor and contactor, measures voltage at the disconnect, and evaluates airflow through the ductwork and at the return filter.
How do I know if I should repair or replace my AC?
If the repair cost is less than half the price of a new system and your current unit is under ten years old with no history of repeated failures, repair usually makes sense; if the unit is older than twelve years or has needed multiple repairs in the past two seasons, replacement often proves more cost-effective over the next few years.
Why do AC coils freeze in hot weather?
Frozen coils form when airflow across the evaporator drops too low—usually due to a clogged filter, closed vents, or a failing blower motor—or when refrigerant levels fall below the correct range, both of which cause the coil temperature to drop below freezing even while outdoor temperatures stay high.
Can I run my AC while waiting for a repair appointment?
Running a system with frozen coils, a failing capacitor, or low refrigerant typically worsens the damage and can lead to compressor failure, which turns a relatively affordable repair into a major expense; it's better to turn the system off and use fans until the repair is completed.
What causes capacitors to wear out?
Capacitors degrade from heat exposure and the constant electrical load of starting the compressor and fan motor dozens of times per day, and in Lexington's climate where AC units run for months straight, capacitors often fail after five to seven years of service.
White Knoll Heating and Cooling provides clear repair assessments and helps you understand what failed, why it happened, and what to expect going forward. Request a diagnostic appointment to get your system evaluated and a written estimate for the necessary work.
