automatically interrupting the burner circuit or gas valve power when it detects temperatures exceeding safe operating parameters

A healthy Lennox 19W61 ignitor should read between 25 and 47 Ohms

it is frequently utilized in tandem with type ORD valves to hold back liquid refrigerant in the condenser for reliable head pressure management

Simplified Integration: Designed for horizontal installation without an indexing switch

Can I use 78A2501 instead

Carrier HH79NZ057 Thermistor 340155-7024 automatically interrupting the burner circuitThe Carrier HH79NZ057 Thermistor is a critical sensing component engineered specifically for low ambient control systems in Carrier, Bryant, and Payne condensing units. This thermistor monitors liquid line temperatures to provide precise feedback to the head pressure controller, ensuring stable refrigerant flow when operating in cooling mode during low outdoor temperatures. As a genuine OEM HVAC replacement part, the HH79NZ057 ensures accurate