While humming is often caused by a faulty solenoid coil or debris

leak-resistant interface for standard copper refrigerant lines

making it a rugged replacement for OEM safety switches in various high-output appliances

Are there any cross-reference parts for the C340056P19

the ANSI 250 rating and stainless steel trim make this unit highly effective for saturated steam applications

Hubbell Industrial Controls 69WH6 Pressure Switch 326058-758 While humming is often causedThe Hubbell Industrial Controls 69WH6 is a professional grade HI GARD pressure switch engineered for critical high pressure limit protection in commercial and industrial water systems. As a veteran preferred well pump pressure switch, this unit is designed to be wired in series with a standard control switch, acting as a failsafe that opens the contacts and cuts power to the motor once a preset maximum pressure is reached. Rated for heavy duty 5 HP at