The Picaxe Spa Thermostat Circuit Board is in the red areaThe other controls at the top are also in the control box and are unchanged. The other red area is a terminal strip for the original thermostat connections to the spa's relay and logic enclosure. The DB25 connector goes out of the control box and spa to the gas flow sensing optical isolator, the temperature sensor, and the programming connector, which can also be used to record the spa's operation with a terminal. |