Common Questions: What causes a York 160-40 limit switch to trip frequently

By replacing a carbon-fouled or cracked ignitor with this genuine York component

As the direct OEM replacement for part number B1360719

Installation is streamlined via the 1/4" flare nut with capillary connection

McDonnell & Miller 51-S-2 Switch 30067439-890 Common Questions: What causes aThe McDonnell & Miller 51 S 2 is a heavy duty mechanical water feeder and low water cut off (LWCO) designed for low pressure steam and hot water boilers. Engineered for systems with a maximum vessel pressure of 35 psi, this unit features a snap acting SPDT switch that ensures positive electrical contact for burner control or alarm signaling. The 1" NPT connections allow for straightforward integration into existing boiler piping, providing a reliable