Common Air Conditioning Problems and Repairs
There are many problems that can arise with a cooling system. Below are some of the most common.
Refrigerant Leak
Refrigerant is the substance that absorbs and releases heat to cool your home. If there's a leak in the system, your AC will struggle to cool properly, run longer, and may even blow warm air. Low refrigerant levels can cause the compressor to overheat and fail which can be a costly repair. Ready Air technicians can locate the leak, seal it, and recharge the system to the correct level. It's important to note that simply adding refrigerant without addressing the leak is only a temporary fix. Timely repairs prevent further damage and ensure your system runs efficiently and reliably during peak cooling seasons.
Capacitor Replacement
Capacitors store and release energy to help start an air conditioner's motors. A bad capacitor can result in the system not starting, intermittent operation, or strange noises like humming. It’s a common issue that can arise due to various forms of wear and tear or even power surges. When a capacitor goes bad, the motor it serves won’t run, causing the system to malfunction. Ready Air HVAC technicians can test capacitors using a multimeter and replace them quickly if needed. Replacing a faulty capacitor restores your system’s ability to turn on smoothly and helps avoid additional strain on the motor and other key components.
Contactor Replacement
The contactor acts as a switch that controls the flow of electricity to the AC’s compressor and fan motor. When it wears out or gets pitted from frequent electrical arcing, it may not close properly, preventing the system from turning on. Sometimes a contactor will stay closed, causing the system to run continuously. A faulty contactor can also make a buzzing or clicking sound. Replacing a bad contactor is a repair that restores proper electrical control, helping your air conditioner operate safely and reliably throughout the cooling season.
Blower Motor Repair or Replacement
The blower motor is responsible for circulating air through your home’s ductwork. If it fails or runs inefficiently, you’ll notice weak airflow or no air movement at all. Common symptoms include rattling noises, high energy bills, or warm air from the vents. Motor issues can stem from worn bearings, a faulty capacitor, or accumulated debris. In some cases, the motor can be repaired, but older or severely damaged units often require replacement. A functioning blower motor ensures that cooled air is properly distributed throughout your home, helping your system run smoothly and maintaining consistent comfort in all rooms.
Compressor Repair or Replacement
The air conditioning compressor is often referred to as the heart of your AC system because it plays a vital role in cooling your home. It works by pressurizing and circulating refrigerant, allowing heat to be transferred out of your living space. When the compressor fails, your air conditioner will struggle to cool properly—or stop cooling altogether.
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Common signs of a failing compressor include unusual noises during operation, frequently tripped circuit breakers, and warm air blowing from the vents. These problems can be caused by electrical issues, refrigerant leaks, or lack of regular maintenance. Since compressors are expensive and technically complex, repairing them isn't always the most cost-effective solution—especially for older units. In many cases, replacing the compressor or upgrading the entire outdoor unit is the better long-term option.
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To help avoid premature compressor failure, homeowners should schedule routine HVAC maintenance and ensure refrigerant levels are always correct. Taking preventive steps now can extend the life of your AC system and keep your home comfortable throughout the cooling season.
Drain Line Cleaning (Condensate Line Clog)
Your AC removes moisture from the air, which drains through a condensate line. Over time, this drain can become clogged with algae, mold, dirt, or debris, leading to water backups. If the line is blocked, water may leak from the indoor unit, causing damage to ceilings, walls, or floors. Some systems include a safety switch that shuts off the AC to prevent damage, but not all do. Cleaning the drain line involves clearing the blockage and flushing the system with a cleaning solution. Regular maintenance prevents clogs and helps your AC run more efficiently while protecting your home from water damage.
Evaporator Coil Cleaning or Repair
The evaporator coil absorbs heat from your home’s air as part of the cooling process. Over time, it can become dirty or clogged with dust, reducing efficiency and causing the coil to freeze. Frozen coils can stop the AC from working entirely and may damage other components. Cleaning the coil with specialized tools and chemicals restores heat exchange performance. If the coil is corroded or leaking refrigerant, it may need to be replaced. Regular maintenance helps prevent these issues, but if performance drops or ice buildup is visible, having the coil professionally inspected and serviced is essential.
Electrical Wiring or Fuse Repair
Your AC system relies on proper electrical connections to function safely and efficiently. Loose wires, corroded terminals, or blown fuses can interrupt power to the unit, resulting in it not turning on or running erratically. Sometimes the issue is due to a tripped breaker or a short in the system. These electrical problems can also pose safety hazards like sparks or fire risk. A professional technician will inspect the system’s electrical components, tighten or replace connections, and ensure the correct fuses and breakers are in place. Prompt attention to electrical issues keeps your AC running safely and prevents future failures.
Regardless of what problem you may be experiencing with your air conditioner, Ready Air's team of qualified HVAC technicians are here to answer any questions you may have and diagnose the cause of your air conditioning unit not working at peak performance. Call us today at (410) 904-6433. We stand READY.