Because it is made of non-electrolytic polyethylene

The "/U" suffix typically denotes "Unit" or "Universal" packaging for retail distribution

this spring allows technicians to set a stable outlet pressure range of 4-12" w

ensuring the unit maintains its rated AFUE performance

This part is a confirmed replacement for York 7900

Nordyne 632484R Flame Sensor Because it is made ofFor service technicians working on Nordyne furnace repair, the Nordyne 632484R Flame Sensor is the direct performance matched replacement for the legacy 632484 part number. This critical safety component utilizes flame rectification to monitor burner ignition, ensuring the gas valve only remains open when a stable flame is present. Engineered for the Nordyne Miller residential line, it is high heat rated to operate between 537? C and 1371? C,