verify that the orifice is clear of oil and debris to maintain flow coefficients

26" WC on rise to ensure precise safety cut-offs for specific residential furnace platforms

Look for "hissing" at the actuator housing or a damper that fails to reach its full stroke despite receiving full signal pressure

replacing an aged or drifting thermistor with this OEM spec component prevents compressor cycling issues and maintains system efficiency

The first stage features dual stainless steel orifice tubes that provide 10-micron mechanical separation

McDonnell & Miller 343400 Float and Gasket Els PW 17895 verify that the orifice isWhen you are performing an annual teardown on a McDonnell & Miller Series 63 low water cut off, the 343400 Float and Gasket assembly (Model SA63 30) is a standard replacement for maintaining system integrity. This OEM kit includes the precision engineered float, the CO 12 head gasket, and the necessary rod component to ensure accurate liquid level sensing in high demand steam and hot water boiler applications. Designed for a maximum boiler pressure of