the Carrier HH18HA279 Defrost Sensor is often your primary point of failure

Technicians should inspect the existing thermocouple or thermopile and replace them simultaneously if they show signs of oxidation or low millivolt output

this unit is the direct replacement for the legacy KMC CCE-3012

Simplified Installation: Compact 8" x 12

60 Hz motor

Carrier HH18HA194 Limit Switch 326058-758 the Carrier HH18HA279 Defrost SensorFor service technicians addressing limit circuit trips in Carrier, Bryant, or Payne furnaces, the Carrier HH18HA194 Limit Switch is the direct OEM replacement for safety circuit management. This critical furnace high limit switch is engineered with a temperature range of 140F (open) to 180F (close), featuring a reliable manual reset button that prevents the system from automatically cycling if a dangerous over temperature condition occurs. Designed