Armstrong Fluid Technology UKD06853-811 Pump 321702-401 the internal bimetal disc is

the internal bimetal disc is likely defective and requires a furnace limit switch replacement

Use a multimeter to check for 120V AC at the primary input

Contractors should verify the unit’s MCA (Minimum Circuit Ampacity) and MOCP requirements to ensure the electrical service is sized correctly for the 9KW load

This motor requires a 208-230V single-phase power supply and is rated for 1HP applications commonly found in commercial blower assemblies

while the 1/4" quick-connect terminals allow for a fast swap during a service call

Armstrong Fluid Technology UKD06853-811 Pump 321702-401 the internal bimetal disc isThe Armstrong Fluid Technology UKD06853 811 Pump is a high performance centrifugal pump engineered for precision fluid management in demanding HVAC systems and glycol make up units. Operating at a powerful 3 4HP motor output with a high speed 3600 RPM configuration, this unit is optimized for 115V single phase electrical environments. Built with a rugged cast iron body, the UKD06853 811 ensures long term structural integrity in residential,