Quote:
Originally Posted by CWGUY
 How does furnace and AC work?
During warm seasons your heating system works with your central air conditioning. Air is cooled as it's blown over your air conditioning unit's cooling coil, often attached to the air circulating fan of the furnace, and then sent through the same air ducts throughout your home.
The furnace isn't on (gas) just the electric fan.
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When I look thru the sight hole, I can see the furnace is on by the flame.
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