- Jun 3, 2012
I have the self pumping Isotherm unit. Self pumping (special galley sink thru-hull) feature works well (at least here in the NE). Do not believe their claims about their electronic speed adjusting thermostat. According to their claims this optional device will run the compressor at high speed when the engine is running and automatically switch to low speed when on batteries only. Not true. You must manually switch it from high to low. The freezer contains the evaporator coils and spills into the fridge. Some thermostats measure the freezer temperature and some measure the box temperature to control the compressor.