When diagnosing furnace troubleshooting codes related to open limit circuits

Reliable Safety Protection: Features a 20°F fixed differential to prevent short-cycling while ensuring your equipment remains within safe operating temperatures

ensuring exact fit and function without modify field wiring

or restricted airflow—before the unit can be placed back into service

not a hot surface ignitor (HSI)

Rheem-Ruud 47-102473-03 Limit Switch When diagnosing furnace troubleshooting codesThe Rheem Ruud 47 102473 03 Limit Switch is a critical safety component designed for high limit thermal protection in residential and commercial furnaces. This SPST normally closed switch is engineered to monitor heat exchanger temperatures and break the electrical circuit if the internal temperature exceeds the 190F open temperature threshold. Once the system cools to the 170F close temperature, the auto reset mechanism restores the circuit, allowing