Refrigerant is used in an air conditioning system to help create the cool air and remove humidity. Due to leaks, system repairs or annual testing additional refrigerant may need to be added. If a system requires refrigerant to be added it is a sign that it may be leaking. We include a non-intrusive electronic leak test at the time of visit. We also recommend adding leak stop/dye to help slow the leak down and find it in the future.