Question about Honeywell Electronic Programmable Heat/Cool Thermostat - CT3300A100 Heater

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Lennox Gas Frunace fires goes out, fires goes out, fires goes out

Lennox furnace 13 years old fires 3 times and goes out then fan kicks on then furnace fires again and it will run till thermostat seting is satisfied.

What could be the problem? Open limit switch maybe but which on and where is it located?

Thanks in advance, Bill.

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  • winnie05 Dec 29, 2008

    my furnace was working fine before the electricity went out for 5 hours now the furnace just humming and then nothing the house is freezing. HELP..

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Furnace was working fine until the electricity went out for 5 hours now furnace is just humming and then nothing...HELP...

Posted on Dec 29, 2008

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Check your thermostat anticipator setting. If you dont know how to do this don't try on your own or you may damage your thermostat.

Posted on Dec 16, 2008

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