5-ton replacement in the field

clogged ports that cause delayed ignition

Always verify chemical compatibility with bellows materials for specialized applications

for diagnostic purposes

For a seamless HVAC part installation

Carrier 321979-401 Wiring Harness 318973-401 5-ton replacement in the fieldThe Carrier 321979 401 Wiring Harness is a critical OEM HVAC replacement part designed for specific commercial and residential air handling units and furnace systems. As a main wiring harness, it serves as the primary electrical interface between the system control board, inducer motor, and safety limit switches. This assembly features high temperature rated insulation and factory terminated connectors to ensure low resistance and reliable HVAC