this OEM part is specifically designed for Nordyne G7-series single-stage condensing and non-condensing gas furnaces that originally specified the 632484 part number

How should the sensor be mounted for the most accurate reading

restoring the circuit for normal operation

What causes this flame sensor to fail

It acts as a restrictor to optimize the burner-to-vent transition

McDonnell & Miller 354140 Replacement Probe 30067439-890 this OEM part is specificallyThe McDonnell & Miller 354140 is a high precision PA 800 RX2 replacement probe engineered for field service reliability in low water cut off (LWCO) applications. Designed specifically for the PS 800 series and PS 850 series controls, this probe features a 1 2" NPT male threaded connection and a remote mount configuration for versatile installation in steam or hot water boilers. Built to withstand demanding boiler environments, it maintains high signal