I Have Not Heat And We Are Freezing LENNOX G12 FURNACE NO HEAT. - HVAC - DIY Chatroom Home Improvement Forum


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Old 11-07-2012, 02:12 PM   #1
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I have not heat and we are freezing LENNOX G12 FURNACE NO HEAT.


Lennox G12 series fan starts first and the pilot goes in 2 seconds, not heat. Please help.

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Old 11-07-2012, 02:15 PM   #2
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I have not heat and we are freezing LENNOX G12 FURNACE NO HEAT.


I already replaced the flame sensor thinking that was the issue...same problem fans starts first and the sparking goes crazy pilot lights on for just 2 o3 seconds...anybody out there who knows about lennox HELLLLPPPP PLEASE.!!

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Old 11-07-2012, 02:17 PM   #3
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I have not heat and we are freezing LENNOX G12 FURNACE NO HEAT.


Place the sensor in a better position in the flame. Make sure all wire connections are tight, including ground wire. Does the control board have a ground? Is the high voltage have a ground that's connected?
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Old 11-07-2012, 05:49 PM   #4
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I have not heat and we are freezing LENNOX G12 FURNACE NO HEAT.


Make a call to a good service company. That furnace is around 30 years old and you want a safety check every year to make sure the heat exchanger isn't cracked. They can tell you what's wrong while they're there inspecting the thing.
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