The Johnson Controls A28AA-4 2-SPDT 2-Stage Mechanical Space Temperature Control is a reliable thermostat designed to regulate indoor temperatures between 30°F and 110°F for consistent comfort and efficient HVAC operation. Using a two-stage mechanical switching mechanism with dual SPDT contacts, it accurately responds to room temperature changes and controls heating and cooling equipm... https://www.partshnc.com/30110f-2-stg-coil-bulb2-spdt