When Your Air Conditioner Stops Working Right

Air-conditioning problems can come from electrical components, restricted airflow, refrigerant issues, damaged motors, drainage problems, or normal wear inside the system. Because several failures can produce similar symptoms, a complete diagnostic inspection is often necessary before recommending a repair.

White Knoll Heating and Cooling can help diagnose problems involving:

• Air conditioners that will not start
• Systems blowing warm or weak air
• Frozen evaporator coils
• Refrigerant leaks or low refrigerant levels
• Failed capacitors and contactors
• Faulty thermostats and controls
• Clogged condensate drain lines
• Water leaking around the indoor unit
• Blower motor and condenser fan problems
• Short cycling or continuous operation
• Unusual noises or odors
• Uneven cooling throughout the home
• Rising energy bills caused by inefficient operation

Our goal is not simply to get the equipment running temporarily. We work to identify the underlying cause of the failure so you can make an informed decision about the repair.

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.

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.