Nordyne 626552R Fan Switch While the 325 series is

While the 325 series is often used indoors with the vent limiter

this part is the direct replacement for S1-025-27792-001

fittings are measured by Outside Diameter (OD)

and V5011G series globe valves

System Integrity: Specifically matched for Parker A9 series regulators to eliminate bypass leaks and atmospheric discharge

Nordyne 626552R Fan Switch While the 325 series isThis Nordyne 626552R Fan Switch is the direct engineering update for the legacy 626552, designed specifically for high reliability HVAC blower motor control. As an OEM Nordyne part with an F115 20 technical designation, it functions as a normally open (NO) switch that closes upon reaching 115F and maintains a 20F differential. This ensures precise furnace fan limit control, preventing short cycling and optimizing airflow in air handlers and downflow