Trane KIT15331 Pressure Switch 320788-702 Simplified Serviceability: The 3-way valve

Simplified Serviceability: The 3-way valve design with a low-pressure gauge port simplifies diagnostics and system maintenance

It is recommended to install external overcurrent protection on the secondary side to protect downstream 24V components

The open construction design allows for seamless integration into 120/240 Vac electrical circuits

This dual pressure switch is engineered to monitor critical draft inducer performance

ensuring a perfect fit and reliable replacement blower performance

Trane KIT15331 Pressure Switch 320788-702 Simplified Serviceability: The 3-way valveThe Trane KIT15331 Pressure Switch is a specialized high altitude conversion kit designed to maintain precise combustion analysis and safe furnace operation at elevations typically exceeding 4,000 feet. At these altitudes, the lower air density results in insufficient negative pressure for standard factory switches, which can lead to nuisance lockouts, pressure switch errors, and unreliable draft inducer performance. This OEM High Alt Press Switch