Many older central air conditioners in Plano were installed with a 1 1/8-inch refrigerant line, while many newer systems are designed for a 7/8-inch refrigerant line.
Using the wrong refrigerant line size can affect refrigerant flow, compressor performance, system efficiency, and equipment life. Some manufacturers allow larger refrigerant lines under specific conditions, but others require the correct size to maintain performance and warranty coverage.
Before replacing your AC, have your HVAC contractor verify whether your existing refrigerant line meets the new system's specifications. Replacing the refrigerant line during installation may help prevent future performance and reliability issues.