Lennox 27K79 Limit Critical Sizing: Accurately machined to

Critical Sizing: Accurately machined to a #29 drill size for industrial-grade reliability

Engineered for furnace high limit protection

If the sensor detects a flame before the ignition sequence

Common Questions: Is the Danfoss 023Z5003 compatible with R-22 systems

heat pumps

Lennox 27K79 Limit Critical Sizing: Accurately machined toThe Lennox 27K79 175F Limit is a critical safety component designed for precise thermal regulation within the furnace plenum. As a primary high limit control, this genuine OEM replacement part is engineered to interrupt the electrical circuit to the gas valve if internal temperatures exceed the 175F threshold, effectively preventing heat exchanger damage and ensuring system safety. This furnace high limit switch features an automatic reset mechanism