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Common Questions & Troubleshooting Why is my furnace clicking but not igniting
This OEM Lennox replacement part
the sensor must be replaced immediately to prevent electrical shorts to the burner ground
Hermetic (HERM)
Simplified Installation: Standardized mounting footprint reduces labor time during PTAC thermostat installation or system upgrades
Johnson Controls A99BC-1500 Temperature Sensor Freon Common Questions & Troubleshooting WhyThe Johnson Controls A99BC 1500 is an industrial grade PTC Silicon Temperature Sensor engineered for precision monitoring in demanding HVACR environments. Featuring a 49 foot high temperature silicon cable, this passive sensor is designed specifically for deep reach applications where standard PVC leads fail. With a robust operating range of 40 to 248F, it provides reliable data for defrost termination, condenser fan cycling, and space temperature