McDonnell & Miller 193-B-7B Controller Els PW 29614 Common symptoms include a furnace

Common symptoms include a furnace that cycles but fails to light

Standard replacement units usually require a separate 10 MFD / 370 VAC run capacitor

Corrosion Protection: Epoxy powder coating ensures the unit withstands moisture and corrosive atmospheres found in rooftop or coastal installations

Durable construction minimizes moisture-related signal failures in high-vibration commercial HVAC environments

Ensure your AAON HVAC system performance remains within factory spec by using exact-match HVAC replacement fan blades to prevent premature fan motor failure and maintain optimal head pressure

McDonnell & Miller 193-B-7B Controller Els PW 29614 Common symptoms include a furnaceThe McDonnell & Miller 193 B 7B (Part Number 164700) is a heavy duty combination low water cut off and pump controller specifically engineered for commercial and industrial steam boiler applications. Designed to handle a maximum pressure of 150 PSI, this unit features a No. 7B proportional control switch that provides a 135 ohm potentiometer signal. This allows for precise, continuous modulation of the feed water flow rather than simple on off