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System Protection: Isolates the temperature bulb from the high-pressure environment
Always match the 250°F specification of the 10123530 switch to maintain the furnace’s UL certification and ensure the gas valve shuts down at the correct safety threshold
and external contaminants
It is rated for low pressure pneumatic applications
while the 24-inch lead wire simplifies HVAC sensor installation in tight plenum spaces
McDonnell & Miller RB-24E-L Control 30067439-890 System Protection: Isolates the temperatureThe McDonnell & Miller RB 24E L (Part Number 144690) is a specialized residential low water cut off designed for 24V hot water boiler systems. This electronic LWCO utilizes a 3 4" NPT probe style sensing element to monitor for hazardous low water conditions, ensuring the burner circuit is interrupted before equipment damage occurs. Unlike manual reset models, this unit features an auto reset function that restores operation once the water level
