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this part is a direct drop-in for ensuring furnace high limit protection across compatible 1LD
alerting the contractor to underlying issues such as cracked heat exchangers
This HVAC temperature sensor is explicitly compatible with York model 9RT1H542-1 and integrated into advanced system profiles like the BP150C00B4AAA3
Check for 120V at the primary leads
Trane SWT3982 Switch L99H008 this part is a directThe Trane SWT3982 is a critical high limit reverse flow switch designed for precision thermal monitoring in light commercial and residential HVAC systems. Engineered for specific setpoints, this bimetal snap action switch features a 105F opening temperature and resets on a temperature fall at 95F. This 10 degree differential ensures stable cycling and prevents short cycling of the compressor or heater banks during low airflow conditions. Built to
