Aprilaire thermostat troubleshooting involves understanding the thermostat’s components: display, buttons, wiring, terminal block, and batteries. It also entails exploring the heating and cooling system, including the furnace, air conditioner, air handler, condensate pump, ductwork, and HVAC filter. Additionally, electrical system interconnections play a critical role, encompassing circuit breakers, electrical panel, wiring, outlets, and transformers
