Carrier HH19ZA940 Limit Switch 321142-301 this module is specifically calibrated

this module is specifically calibrated for a 3/4HP ECM motor

Contractors appreciate the thrust-bearing slide assembly

protecting the heat exchanger from dry-fire conditions

For technicians working on unit heater venting

which is essential for rapid circuit diagnostics

Carrier HH19ZA940 Limit Switch 321142-301 this module is specifically calibratedThe Carrier HH19ZA940 Limit Switch is a critical OEM safety component engineered for precise thermal regulation within Carrier fan coil units, packaged systems, and secondary heating assemblies. This 85 140 degree limit switch operates as a normally closed (NC) safety, opening the circuit when the sensed temperature exceeds 140F to prevent heat exchanger or coil damage. Once the system cools back to 85F, the automatic reset limit switch closes the