It is best practice to inspect both during a no-heat service call

The Resideo 393690-15 Flange Kit is a critical field replacement component designed for seamless integration with V4043

this limit switch protects the heat exchanger and blower motor from overheating conditions

maintaining accurate HVAC control system calibration

What manifold pressure should I set after installing this spring

Johnson Controls TE-6374-1 Temperature Sensor It is best practice toThe Johnson Controls TE 6374 1 is a professional grade 10k ohm Type II thermistor designed specifically for direct sheet metal mount applications within commercial HVACR systems. Built for high accuracy thermal monitoring, this sheet metal temperature sensor features a specialized probe that maintains direct contact with the mounting surface, ensuring rapid response times and precise data transmission to your building automation system (BAS). This