Velocity Boiler Works (Crown) 233081 Flue Sensor Kit Els PW 17895 Key Benefits for Technicians: Superior Key Benefits for Technicians: Superior Compressor Protection: Prevents liquid refrigerant from entering the compressor Field Efficiency: Simple plug and play 24V connection allows for rapid setup and adjustments without replacing the entire motor control board the 233081 flue temperature sensor triggers a system shutdown if flue temperatures exceed the design limits of the venting material this kit ensures the control board receives accurate thermal feedback to prevent heat exchanger damage and maintain safe combustion parameters