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restrictor is required when used with low-volume output controllers
Key Benefits for the Contractor: Molded Porous Core: Provides superior filtration of solid contaminants to prevent metering device blockages
What causes a high-limit switch to trip repeatedly
under-voltage leading to plunger stalling
including the 21-076 part number
Trane SWT2533 Pressure Switch Els PW 17895 restrictor is required when usedThe Trane SWT2533 Pressure Switch is an essential OEM safety component designed for precise draft pressure monitoring in Trane and American Standard furnaces. This single pole, normally open switch is engineered to detect specific vacuum thresholds, ensuring the inducer motor is moving sufficient combustion air before ignition occurs. With a calibrated operating range of 1. 11 PF Open to 1. 29 PF Close, the SWT2533 prevents hazardous operation caused