Question about Heating & Cooling
Trying to find information on a Lennox furnace is very difficult, they only sell to factory authorized installers. If you have a flame sensor that you think is defective, here is how to check it. Check, with an ohmmeter, the resistance from the tip of the flame sensor to the connector that plugs into the board (on the end of the wire) you should read no resistance. Check the resistance between the flame probe and ground, with the flame probe installed in the appliance, you should get OL or infinite resistance. Hope this helps
Posted on Jan 30, 2010
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Posted on Jan 02, 2017
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