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Lennox G26 gas heater Elite 90 Q2-50

My neighbor has a problem with his heater. The fan motor and combustion exhaust fan come on but the ignition probe is not geting hot.
Checked the contol board and have 120 volts coming into the board and 120 volts going out to the fan controls but am only getting 67 volts to the ignition probe.
There are also 2 blinking green lights on the control board but I have no idea what they are indicating.
There are a lot of children living in the house and they are short on cash so I am trying to help them with a little Xmas help.

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  • Clam Digger Dec 18, 2007

    Thank god I have a friend that does residential heater repairs.

    Turns out that when you open the filter bay without turning the power off it puts the system in standby and must be reset before the system will go back to it' normal sequence.




    Had to turn the system off to reset it, then reprogram the thermostat (all seven days all 4 settings per day), put the t-stat into manual mode, set the t-stat on heat, this allowed the sequencing to resume to normal. Once the igniter fired and the room heated it was possible to to put the t-stat back to auto and all was normal.


    This was a much more complicated procedure than would be comfortable for most home owners. All this for just replacing the filter! Lennox needs to get in contact with the real world and stop making filter changes something that can only be accomplished by a certified Lennox HVAC mechanic.


    I'me sure they do this for some safety concerns on the owners behaf, but they could put this somewhere in thier manual. They do not!


    Thank God I don't own a Lennox! 

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Need new ignition probe

Posted on Dec 17, 2007

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