We've had ours in operation for a year and a half with nary a problem, but this morning the wife noticed a previously frozen piece of fish that was thawing. We keep a thermometer in the fridge compartment which indicated 39F degrees which I think is acceptable. I moved it to the right freezer section and it's only showing 36F degrees. We've been stationary in FL for over a month operating on AC. It did get down to freezing last night, but is already up to almost 60F now. Freezer was defrosted a week ago and I checked and there is nothing in either internal or external drip trays. Ice in the left freezer compartment remains frozen. Any thoughts? And, any idea what freezer temperature can actually be expected?