Trane SWT1987 Switch 30067439-890 including the Robertshaw 620-402 and

including the Robertshaw 620-402 and Supco SXT111

all of which cause internal furnace temperatures to rise above the safe 93°C limit

or Coleman equipment to maintain factory-spec SEER ratings and moisture removal capabilities

making it a staple for any service truck specializing in cooling system maintenance

eliminating the calibration risks of universal "will-fit" switches

Trane SWT1987 Switch 30067439-890 including the Robertshaw 620-402 andFor high reliability operations, the Trane SWT1987 Switch is a critical mechanical interlock switch designed to prevent the simultaneous engagement of multiple power sources or contactors. This HVAC safety switch is engineered for heavy duty applications, specifically compatible with NEMA Size 4 contactors and starters. Built with a NEMA 4 enclosure, this unit provides superior protection against dust and moisture, making it an essential component for