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Question About Lennox International Inc. Thermostat GS 903-120-140
Manual...

Working on an old Lennox and can't not seem to get the unit to light. Checked the ignition switch and other items. Seems like it isn't getting gas like a blockage, but gas it coming to the stove and water heater in the house. Any suggestions why the heating unit will not start up and work?

Asked by Sheila on 12/25/2008 0  Answer

ManualsOnline posted an answer 15 years, 9 months ago

The ManualsOnline team has found the manual for this product! We hope it helps solve your problem. Get the Manual Here

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