Refrigerant leak repair cost cannot be reduced to one reliable national price. The useful comparison is the written scope: diagnostic work, exact equipment or component identity, access, compatible parts, labor, refrigerant handling when applicable, electrical or duct corrections, permits, commissioning, warranty terms and disposal. A low headline figure and a complete installed scope are not the same product.
A qualified technician can evaluate system operation, use appropriate leak-detection methods, determine repairability, and handle refrigerant under applicable requirements. Ask the proposal to distinguish leak search, access, repair or component replacement, recovery, evacuation, refrigerant, verification, and any warranty limitations. Refrigerant type and availability, environmental rules, coil or line access, climate, and jurisdictional requirements may change both method and scope. Record visible icing, oily residue, hissing, water, and declining performance without touching lines or opening panels, and stop operation if severe icing or damage is present. Adding refrigerant and locating and repairing a leak are different services, and poor cooling can also arise from airflow, controls, or other system faults.