McDonnell & Miller RB-24E-L Control 30067439-890 It is rated for low

It is rated for low pressure pneumatic applications

This genuine OEM Lennox part (MPN: 38M07) features a 3-inch insert length and operates as a normally closed switch

which is essential for preserving compressor longevity and system EER ratings during heavy load conditions

while the 24-inch lead wire simplifies HVAC sensor installation in tight plenum spaces

System Protection: Isolates the temperature bulb from the high-pressure environment

McDonnell & Miller RB-24E-L Control 30067439-890 It is rated for lowThe 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