this York HVAC safety switch prevents thermal runaway by interrupting the burner circuit if airflow is restricted or internal temperatures spike

This kit allows technicians to restore original seat integrity and pressure ratings without necessitating a full valve body replacement

Continuous exposure to acidic combustion gases and exterior elements causes oxidation

Accurate Monitoring: Simple single-pointer scale allows for rapid diagnostics and setup on the 20" Hg to 100 PSIG range

this part is the direct OEM specification for GV90+ units as well as older AHE and GV models

Trane SWT3172 Pressure Switch 320788-703 this York HVAC safety switchThe Trane SWT3172 High Pressure Switch is a critical safety component designed for professional grade protection in residential and commercial HVAC systems. This OEM Trane pressure switch acts as a fail safe, monitoring discharge line pressures to prevent catastrophic compressor failure. Engineered for high pressure refrigerants like R 410A, this 800 PSI cutout switch automatically interrupts the 24V control circuit when system pressures exceed safe