Description
This is a Brand New OEM Lennox/Armstrong/Ducane Furnace Flame Sensor. Part # is 69W43 (also LB-74940B). This sensor has a 90 degree bend in it. Thanks and Good luck!
Function:
A flame sensor senses the furnace flame ensuring that ignition has occurred. It then monitors the flame until the furnace shut down. Should combustion be disrupted for any reason the sensor loses its signal and shuts the gas valve off.
Replaces Old Part #s:
LB-74940B
Repair Difficulty Level:
Partial List of Units that Use This Item:
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