The manual reset thermal limit is a safety standard

or a loss of pressure downstream that suggests the stem seal has been compromised

If your system is tripping on high-pressure codes despite clean coils and a functional fan

depending on the specific equipment wiring diagram

The electrical configuration handles significant inductive loads

Nordyne 632401R Pressure Switch The manual reset thermal limitThe Nordyne 632401R High Pressure Switch is the direct OEM replacement for the legacy 632401 part, engineered specifically for high pressure safety regulation in residential and light commercial HVAC units. As a vital safety cutout switch, this component is calibrated to maintain system integrity by monitoring refrigerant discharge pressures. Featuring an automatic reset configuration, it protects the compressor from damage due to restricted airflow