Thanks Curt for prompting me to get the number and capacity. We did start all this after we verified that the functional parameters EWT-LWT, EAT-LAT were no where close to what this should do. It is most interesting to me that in the cooling mode they are right on what we should expect. The tech support has contacted the manufacture and discussed with their engineering support. Their take was that somehow this thing got our low on refrigerant and it may still need more. The plan will be to evacuate the system and load 68oz back in and then we will know exactly what we have. This will be a while as we are now traveling south (that's what old retired engineers do!).