The Emerson Climate-White Rodgers 24A34-5 is an electric heat sequencer designed to control staged activation of heating elements in HVAC systems. It operates using a temperature-responsive bimetal mechanism that closes and opens contacts in sequence, preventing all heating elements from energizing at once. Commonly used in electric furnaces and air handlers, it ensures balanced elect... https://www.partshnc.com/24a34-5-emerson-climate-white-rodgers-heat-sequencer