Because this is an "Open on Rise" (SPST) switch

What causes a Wayne HSG burner air switch to fail

this specific model (RA suffix) is designed to open on rising temperature

OEM Compatibility: Direct replacement for BRG02219

The AT-11-401 is engineered with sufficient venting to allow for natural convection

Danfoss SM115-4RI Compressor THPU32HP7Y Because this is an "OpenThe Danfoss SM115 4RI is a high performance R22 scroll compressor designed for large scale commercial air conditioning and heat pump applications. Operating on 460V 3 phase power, this Danfoss SM series model delivers a nominal capacity of 115,200 BTU hr, making it a reliable choice for maintaining precise climate control in heavy duty systems. This unit features rotolock connections for straightforward installation and maintenance, with a suction