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If the contactor does not pull in despite receiving a 24V signal from the board
this component serves as the primary line of defense
Key Benefits Efficient Automation: Provides seamless SPDT automatic changeover to switch thermostat control between heating and cooling circuits
or improper heat strip staging that forces temperatures above the 117°C limit
Secure Connections: Rotolock fittings simplify field installation and maintenance by eliminating the need for brazing in tight spaces
Lennox 73K81 Ignition Cable THPU32HP7Y If the contactor does notThe Lennox 73K81 Ignition Cable is a critical OEM replacement component designed to maintain the electrical integrity of the ignition circuit in residential and light commercial gas furnaces. Engineered to withstand high voltage output from the furnace ignition control board, this cable ensures a consistent spark or heat signal reaches the ignitor to initiate the combustion cycle. Constructed with premium, high temperature resistant insulation, the
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