Merit Heating & Air Conditioning | Reliable HVAC Repair in Santa Ana, CA

Common signs include your AC blowing warm air, ice forming on the refrigerant lines or evaporator coil, a noticeable hissing or bubbling sound from the unit, and a sudden spike in your energy bills. Refrigerant leaks reduce cooling efficiency and can damage the compressor. If you notice any of these issues, it's best to call a professional for a diagnosis and repair to restore your system's performance.

In Santa Ana, where dust and allergens are common, we generally recommend checking your air filter every month and replacing it at least every 90 days. If you have pets, allergies, or run your system frequently, you may need to change it every 30-60 days. A clogged filter restricts airflow, forcing your system to work harder, increasing energy costs, and reducing indoor air quality. Regular replacement is a simple, effective way to maintain your HVAC system.

Yes, a severely clogged air filter can lead to system failure. Restricted airflow causes the evaporator coil to freeze and can cause the system to overheat and shut off as a safety precaution. While replacing the filter may resolve a minor freeze-up, repeated incidents can cause long-term damage. If your system shuts down, check the filter first, but if the problem persists, contact us for a professional inspection to prevent costly repairs.