This part is a drop-in for common models like the 48EJE and various 310AAV/311AAV furnace series

Durable Construction: Components are built to withstand the rigors of HVAC troubleshooting and industrial fluid control

Common Questions What is the typical runtime for the NFB24-SR

If horizontal

maintaining the integrity of the thermistor resistance curve is essential for preventing system lockouts and maintaining COP efficiency

Resideo TL8230A1003 Thermostat 319847-401 This part is a drop-inThe Resideo TL8230A1003 is a high performance LineVoltPro 8000 digital thermostat engineered specifically for 208 240 Vac resistive heating systems. This 7 day programmable thermostat features a DPST switching action, effectively breaking both sides of the line for a positive "off" during the shoulder seasons. Designed for contractors who prioritize precision, it provides electronic line voltage control within + 1F, significantly reducing the "swing"