I am a happy owner of an upright frost free freezer which, after only two years, has needed to have its mechanical defrost timer replaced. Apparently, this timer runs the heater coil for twenty minutes after every twelve hours of compressor operation.
My question is: are there any controller upgrades that would be more intelligent about running the defrost coil? For example, a simple, improved rule set would consist of:
IF time since last last defrost > 12 hours AND positive rise (defrost timer is being energized because thermostat closing) THEN start defrost cycle ELSE run compressor
It strikes me that there might be a drop-in replacement controller that already follows similar logic, which would theoretically greatly reduce the chances of short cycling the compressor when initiating a defrost cycle.
In our usage case, we open and close the freezer at least once a day and try to keep it packed to the gills with pwecious fwood.