this limit switch is a standard safety component across the Carrier/Bryant/Payne family of residential heating equipment

the switch breaks the circuit to prevent equipment damage and ensure safe operation

and Richmond heating units

making it a versatile addition to a service truck inventory

the Nortek 151888R acts as a calibrated restrictor that regulates the volume and velocity of airflow through the draft inducer

MARS 61611 Auxiliary this limit switch is aThe MARS 61611 is a professional grade 1 N C (Normally Closed) side mounted auxiliary switch engineered for integration with 25 60 Amp definite purpose contactors. As a veteran preferred HVAC contactor auxiliary switch, this component provides reliable feedback and interlocking for commercial refrigeration and air conditioning control circuits. This specific model is a direct replacement for Trane SWT1733, ensuring seamless mechanical compatibility