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The cost to replace Freon varies by the amount needed since it is charged by the pound. The typical charge starts with an $89 service call to visit the home and inspect your AC system. From there, the cost to add Freon is $68 for the first pound and $58 for each pound thereafter.
R-22 can influence your options. If an A/C unit requires additional refrigerant â as Thomasâ did in 2012 â it signals thereâs a coolant leak. Topping off a system with R-22 refrigerant, known as Freon, costs as much as $40 to more than $175 per pound â which may also include the cost of the service call. Fixing the leak and putting in several pounds of refrigerant can cost $550 to $1,000, HVAC pros say.