The cost of repairing a car's air conditioner can vary depending on the severity of the problem. Minor issues such as a refrigerant leak or a clogged condenser can cost anywhere from $100 to $500 to repair, while more severe issues such as a faulty compressor or a damaged evaporator can cost upwards of $1, 000 to fix. Other factors that can affect the cost of repairs include the make and model of your car, the age of your car, and the location of the repair shop. It is important to get a written estimate from a qualified mechanic before any repairs are made.