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-   -   Lennox MGF80 Won't Light (http://www.diychatroom.com/f17/lennox-mgf80-wont-light-161431/)

knappn 10-28-2012 04:12 PM

Lennox MGF80 Won't Light
 
The furnace blower comes on and the igniter goes through 3 attempts to light then goes to lockout. I have removed the flame sensor and all six burners and cleaned them. I reinstalled them and the problem still exists. However when I remove the burner in front of the igniter, the furnace lights. I have had the gas pressure and limiter switches all check ok.

beenthere 10-28-2012 07:06 PM

My manometer doesn't have a gas pressure ok reading, so i don't know what ok is.

Could have a cracked heat exchanger.

ben's plumbing 10-28-2012 08:02 PM

Quote:

Originally Posted by beenthere (Post 1039847)
My manometer does have a gas pressure ok reading, so i don't know what ok is.

Could have a cracked heat exchanger.

hey b t iam glad you have an ok setting on your manometer...mine don't...I'll bet yours don't either :laughing:...i know what you mean....ben sr

beenthere 10-28-2012 09:05 PM

Quote:

Originally Posted by ben's plumbing (Post 1039884)
hey b t iam glad you have an ok setting on your manometer...mine don't...I'll bet yours don't either :laughing:...i know what you mean....ben sr

LOL. I fixed my spelling.


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