What happens if the entering air temperature gets too cold?
The patented process GEO-THERMAL SYSTEMS, INC.® heat pump is designed to shut off if the ambient air temperature passing over the coils drops below 40°F. This is to avoid freeze up of the unit. When this happens, electrical contacts in the heat pump are energized, so that power is available to the resistance heaters. The resistance heaters are used as the engine heating source until the ambient air temperature rises above 40°F, at which time the heat pump would resume operation.
