Air conditioning units are a piece of common equipment in many homes and businesses, and they provide a much-needed service during the hot summer months. However, like any other appliance, AC units can break down and require repairs. In some cases, the issue may be something that parts are available for and the repair cost is relatively low. However, in other cases, the repair cost may be quite high or the unit may be beyond repair. In such cases, replacement may be the best option. If your AC unit is leaking freon, for example, it may be best to replace the unit rather than try to repair it. In general, if the repair cost is more than half the cost of a new unit, replacement is usually the better option.