A current sensor that stands guard against loss of current

No matter what climate you live in, the temperature throughout the year varies. For some climates that means blazing summers that cool to frigid winters. What many people don't realize is that the temperature below ground (regardless of climate or season) stays fairly consistent all year.  The Geothermal Heating and Cooling Industry has taken advantage of this below ground stable temperature and developed an efficient method of heating and cooling.