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Wood and Gas Furnace question

Posted by ACE_0220 (My Page) on
Mon, Oct 31, 11 at 11:18

sorry if this has already been asked/answered, not finding this specific topic anywhere...
house just built and moved in to this year. wood furnace tied into gas furnace via 8" line to gas unit's plenum. all aspecta of both systems work fine (gas furnace works, central air worked this summer, wood burner and blowers work fine, etc.). My problem is that when buring wood, the gas unit's blower wont kick on while in the "auto" setting. I am basically setting the thermostat to heat and setting the temp to 60 with the fan setting on "auto". i am then burning the wood with hopes that the gas unit's plenum will heat up to the point that the fan will turn on. ultimately, and regardless of how hot the plenum gets, the gas units fan doesnt kick on and i have to manually turn the switch to "on" as opposed to "auto". Wood burner is USSC 1557m, gas unit im not sure on but looks like Johnson Controls model TG9S*MP.

any help would be appreciated.


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RE: Wood and Gas Furnace question

I doubt the fan in your gas furance will just 'automatically turn on' by sensing the heat in the plenum above the gas furnace.

You need to have some type of connection between your wood furnace and gas furnace to turn on the fan on the gas furnace when the fan is blowing on the wood furnace into the plenum.

I would think that an HVAC professional could make this happen pretty easily.


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