O'Neill Heating & Air Conditioning Services

O’Neill Heating & Air Conditioning Services is a Columbia, SC Air conditioning contractor providing AC repair, replacement, and preventative maintenance for local homes. If your system is short-cycling, uneven, or driving up your bill, schedule a diagnostic and request upfront, itemized pricing before work begins. Ask their technicians to perform a proper load calculation, inspect ductwork for leaks, and verify refrigerant charge to maximize comfort and efficiency. Call to book a seasonal tune-up or request a quote for a system upgrade, and ask about manufacturer warranties, utility rebates, and maintenance plans to keep costs predictable.