Nordyne 632550R Pressure Switch 320788-704 Fail-Safe Logic: Integrated spring return

Fail-Safe Logic: Integrated spring return functionality provides an essential safety layer by resetting the valve during power interruptions

the McDonnell & Miller 302500 is specifically sized for the Series 63 and E-28

Inconsistent voltage at the reversing valve is another common indicator

Enhanced Durability: Constructed from professional-grade materials to handle the operational temperatures of high-efficiency condensing furnaces

which can lead to improper vacuum readings and system lockouts

Nordyne 632550R Pressure Switch 320788-704 Fail-Safe Logic: Integrated spring returnThe Nordyne 632550R Pressure Switch is the genuine OEM replacement for the legacy 632550 model, specifically engineered for high efficiency Nordyne furnace units and related HVAC systems. As a critical safety component, this normally open (NO) pressure switch is factory calibrated to a 1. 0" WC make and 0. 7" WC break setpoint. It utilizes a negative pressure diaphragm to verify the draft inducer motor is generating sufficient static pressure before