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      One of the benefits of your Professional Appliantologist membership is that you can attend the regular, live training webinars and you have access to the recordings as well. So if you can't make it to the live webinar, catch the recording at your convenience. The webinar recordings are conveniently listed for you on the Webinar Recordings Index Page.   
jumptrout

Coleman Furnace Manual request

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jumptrout   
jumptrout

Coleman gas furnace model.#7956.

Need manual if available.

Furnace fires,heats up for fan relay to come on.

Fan cycles.

Unit cools quickly and fan stops.

Burner stays lit and repeats above sequence.

Fan limit switch is a 110 degree -20 degree.

Heat exchanger in good condition.

Flue not blocked.

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Need appliance parts? Call 877-803-7957 now!

jumptrout   
jumptrout

Manual no longer needed.

I deciphered the problem.

Furnace had been operating several years with no drip leg installed on the gas supply.

The gas nozzle and orifice had become 50% restricted with a rust buildup.

Although outlet pressure read good on the manometer,the gas pressure reduced greatly at the burner causing low flame and insufficient heat.

A thorough cleaning of the nozzle and the addition of a drip leg has this furnace working like new.

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