Always check for continuity across the leads before replacing

or obstructed pressure tubing

Which air handler models are compatible with the HKR-05C

this unit operates within a precise range of 55 to 90 degrees F

The LWCO feature is automatically activated only when the unit is installed on a specific Hydrolevel Electro-Well

McDonnell & Miller 310488 Switch Assembly THPU32HP7Y Always check for continuity acrossThe McDonnell & Miller 310488 is a field replaceable SWA 42S Snap Switch Assembly engineered specifically for Series 42S low water cut off and pump controllers. This single pole, single throw (SPST) mechanism provides precise automatic reset functionality, ensuring consistent boiler feed pump control and high limit safety across residential, commercial, and industrial steam applications. Built with a robust housing and high quality internal contacts,