I called a tech who seems fairly knowledgable. After a check of the system it appeared that circulation is the problem. After some tapping on the boiler and lines near the burner, the unit cools down at night w/freezer at 19 degrees and frig at 39. Once the next day starts and heats up to about 70, the temperature in freezer rises to 32 and frig gradually rises to 58 degrees by 5 in the afternoon. I never hear the fans running. Could this be the problem? Tech said to call him in a couple of days if the problem didn't correct self. Any one have a further suggestion?