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New Member
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Dec 2, 2009, 07:19 PM
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Lennox furnace fan problems
I have a lennox whiper furnace model c23-31-1 and when the furnace lights after a minute or so you can hear a click sound but the blower motor doesn't kick on. If I put the thermostat fan control to 'on' the fan will run constantly and the furnace will work but when the thermostat is set to 'auto' it does what I described at first. What is wrong with this?
Mike
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Heating & Air Conditioning Expert
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Dec 2, 2009, 07:22 PM
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The fan and limit control OR the fan relay is defective when operating in the heat mode. Usually the heat exchanger heats up to a preset level then the blower turns on.
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Ultra Member
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Dec 2, 2009, 09:40 PM
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Check this gadget, if present.
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New Member
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Dec 3, 2009, 07:46 PM
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It doesn't have that gadget.
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Ultra Member
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Dec 3, 2009, 09:58 PM
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Sounds like the blower is managed by a circuit board, which may be malfunctioning.
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New Member
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Oct 8, 2012, 11:20 AM
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I have a Lennox Pulse furnace G14. Does anyone in this DIY world know where I can find parts for this unit anymore, specifically this fan/limit control? Any help would be great.
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Heating & Air Conditioning Expert
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Oct 8, 2012, 05:45 PM
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If you are smart you will replace the Lennox Pulse. It is old but the main problem is it is a big troublemaker. If you decide to fix it you better find a old furnace man who has a boat load of experience with the Pulse furnace. If not adjusted properly they can go BOOM.
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New Member
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Oct 8, 2012, 08:18 PM
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Thanks HVAC
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New Member
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Oct 8, 2012, 08:20 PM
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Originally Posted by Benny01
Thanks HVAC
Got any suggestion on a brand for a new one. 1600 sq ft house. Built about 1955
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Heating & Air Conditioning Expert
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Oct 8, 2012, 08:46 PM
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Most a newer furnaces are good where there problem comes to play is in the install. You can take a cheap furnace and make it purr like a kitten with the proper install but you can take the most expensive unit and turn it to junk with a bad install. Been saying this for over 45 years and it has always held true.
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