Found system low on 410A refrigerant, leak searched and found possible leak at the evaporator coil. ASAP with 410a, get system working and leak search again to verify where the leak is. Returned on 18th and recharged the Amana heat pump and leak searched, no leak found. The system was repaired on the 14th and was working both heat and cooling, in two days 3lbs. of refrigerant was lost with no leak?