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necessitating a Lennox 27L41 swap
a valve with EPDM or FKM seals and a higher temperature rating would be required
A failed sensor often results in the system failing to enter defrost mode or triggering outdoor temperature faults on the communicating control
which indicates the 80A durometer material has reached its service limit
Trane CNT8121 Control Board 340155-7026 necessitating a Lennox 27L41 swapThe Trane CNT8121 Control Board is a high performance integrated furnace control designed for precise management of heating cycles and blower motor operations. This single stage IFC serves as a direct replacement for various Trane furnace control boards, ensuring seamless integration with existing 24V thermostat wiring and 120V gas valve circuits. As a critical component for maintaining system reliability, the CNT8121 monitors safety limit switches
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