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failure to open despite receiving 24V signal
Common Questions What causes a blocked vent switch to trip
high-pitched whistling (air bypass)
If the switch is open while the unit is cool
Lennox 22K51 Control Board R-22 failure to open despite receivingThe Lennox 22K51 Ignition Control Board (OEM 607308 22) is a critical integrated furnace control designed for high performance service in select Lennox communicating enabled gas units. Engineered to interface with SL280UHV, SL280DFV, EL296UHV, and EL296DFV heating systems, this 120V furnace ignition module ensures precise hot surface ignitor timing and reliable flame sensing. This board replaces legacy 107045 XX series controls, providing a stable
