Abstract: A leak container is provided for detecting whether a refrigerant is leaking from an outdoor condenser of a split system air conditioner. The container includes a substantially gas impervious enclosure having top and side walls for fitting over the condenser. A sealing strip is located on the bottom edge of the walls so that a substantially gas impervious seal can be formed about the condenser. An enclosed space is defined between the condenser and the enclosure. The enclosed space is adapted to contain a refrigerant leaking from the condenser. A plurality of valves are located in corresponding apertures defined in the walls. The valves permit air samples to be taken from the enclosed space. A method for detecting leaks is provided comprising the steps of covering the condenser with the enclosure, sealing the enclosure, collecting air samples through the valves, and testing the air samples for traces of refrigerant.