Lennox 10J42 Hard Start Kit 321042-401 It acts as a safety

It acts as a safety sensor that shuts down the burner if it detects temperatures exceeding 135°F

the P70SA-1 ensures your setpoints remain stable and your equipment stays protected under demanding operating conditions

frequent error codes related to sensor "open" or "shorted" circuits

single-throw (SPST) switch operates as a normally closed safety device

High-Current Capacity: Rated for up to 25A

Lennox 10J42 Hard Start Kit 321042-401 It acts as a safetyThe Lennox 10J42 Hard Start Kit (identical to 10J4201) is a critical genuine OEM HVAC component designed to assist compressors struggling under high head pressure or low voltage conditions. This HVAC start capacitor and relay kit provides the necessary torque boost during the initial startup cycle, significantly reducing the duration of locked rotor amps (LRA) and heat buildup in the motor windings. For technicians servicing Lennox residential or