6 Common Air Conditioning Problems and Repairs
Air conditioning repair involves diagnosing and fixing issues with an AC system to restore its cooling function and efficiency. A professional HVAC technician identifies the problems that hinder the regular operation of your AC unit and resolves them through fixes or new parts. Here are six common air conditioning problems and repairs:
1. Refrigerant Leaks and Dirty Filters
Refrigerant leaks occur when cracks develop in the coolant connections. Signs of this issue include frozen evaporator coils, warm air from vents, and bubbling or hissing noises. Technicians can use an electronic leak detector to identify a refrigerant leak. They can also perform a pressure test to locate bubbles that indicate leaks. Technicians seal the damaged area for minor leaks through soldering, epoxy, or brazing. If the damage is extensive, technicians replace the coils or refrigerant lines.
When filters become clogged, they restrict airflow throughout the system, reducing the system’s cooling efficiency. It may also cause damage to other internal components. During routine maintenance, technicians inspect the filter and replace it if needed. Ice formation on coils and unusual noises from the blower motor confirm a dirty filter. Technicians replace the dirty air filter with a new one, thaw and clean frozen coils, and restart the air conditioning system.
2. Faulty Fan
A fan may spin too slowly, fail to start, or make unusual noises. Faulty fans cause the system to overheat. To diagnose issues with the fan, technicians check whether the blades are damaged or obstructed. They use a multimeter to test for electrical continuity in the motor windings. Air conditioning repair due to faulty fans depends on the cause of the issue. If the capacitor is defective, technicians replace it to restore power delivery to the motor. Replacing damaged fan blades helps prevent imbalance and further mechanical strain.
3. Compressor Issues
Electrical failures, damaged suction lines, or inadequate lubrication can cause the compressor to overheat or fail. To identify compressor issues, the technician checks for refrigerant levels and inspects electrical connections. In case of debris or contamination, the technician flushes and cleans the entire system. If the compressor failure results from wear and tear, the technician replaces it.
4. Thermostat Malfunction
Thermostat malfunctions can result from loose wiring or dead batteries. To diagnose thermostat issues, technicians inspect the wiring and replace dead batteries. They could examine and configure the thermostat settings to optimize your AC performance. If the unit displays inaccurate temperatures, the technician tests its calibration. If the thermostat is outdated, your technician may suggest replacing it with a programmable or smart thermostat to control the temperature better.
5. Capacitor Problems
Capacitors wear out over time, usually from overheating, power surges, or improper voltage ratings. If the capacitor malfunctions, the AC produces humming noises and warm air from the vents. Your technician inspects the capacitor for bulging, leaking, or corrosion. They will test the capacitor’s ability to hold and release an electrical charge. The repair process involves discharging the old capacitor before removal. Your technician disconnects the wires and installs a new capacitor with the specifications.
6. Ductwork Leaks
Loose ductwork allows cool, conditioned air to escape before reaching the intended rooms. Ductwork leaks occur at seams, joints, or connections in the duct system. To identify the leaks, technicians inspect visible duct sections for cracks, gaps, or loose connections. Smoke pencils and infrared cameras help technicians locate leaks in hidden areas. Once they identify the leaks, technicians seal small cracks using mastic sealant. For larger leaks, they replace the affected portions of the ductwork.
Learn More About Air Conditioning Repair
A whole-house air purification system can help improve air quality in your home. It cleans conditions air from the AC from bacteria, mold, and germs. Contact a reputable HVAC technician for more information about air conditioning repair.
