I have a Lennox Whisper Heat forced air gas furnace that is not working properly. I've already cleaned the flame sensor. I believe there may be a problem with the ignition control module. How do I test it with a voltage meter to see if it needs to be replaced or the problem lies elsewhere?
so your burners do lit then go out? if so then take out your flame senor and test it set your meter on ohm it looks like an omega symbol it will say O.L at first put each lead on each end of the flame sensor if it still says O.L then its bad replace it.