McDonnell & Miller RB-24E Wiring Harness 30067439-890 the 310451 is compatible with

the 310451 is compatible with high-performance McDonnell & Miller FS4-3 series

The foot mount design and color-coded wire leads—typically black (common)

While it is an OEM Carrier part

you must use the V-3000-6000 diaphragm

it requires a technician to physically inspect the combustion chamber and address underlying venting or gas pressure issues before the system can be returned to service

McDonnell & Miller RB-24E Wiring Harness 30067439-890 the 310451 is compatible withThe McDonnell & Miller RB 24E (Part Number 144692) is a specialized 24Vac low water cut off designed for residential hot water boiler applications. This 3 4 inch NPT probe type LWCO features an automatic reset and an integrated test switch for streamlined diagnostic checks during routine maintenance. The inclusion of the universal wiring harness ensures straightforward integration into existing control circuits, significantly reducing field