Designed to provide a reliable HVAC actuator replacement

Enhanced Thermal Management: Precise DPST (Double Pole Single Throw) switching ensures heating elements energize and de-energize in the correct order

The alloyed metal construction and corrosion-resistant finish prevent premature failure caused by technical stress and environmental exposure

Check for obstructions in the vent pipe

Will this work on a 5/8" motor shaft

McDonnell & Miller 157S-A Controller Els PW 17895 Designed to provide a reliableThe McDonnell & Miller 157S A (Part Number 173702) is a heavy duty combination low water cut off and pump controller designed specifically for commercial and industrial steam boiler applications. Featuring a snap acting SPDT switch, this unit ensures precise control over water levels and reliable burner cutout during low water conditions. The 157S A model includes alternate tappings, providing versatile installation options for equalizing pipes and