Coleman Model7970B856 furnace - http://www.hvacmechanic.com/ Forums
Original message
| barriage
 |  "Coleman Model7970B856 furnace"
, posted Mon 27 Oct 23:36  
I don't believe my furnace is heating properly. The warm air isn't very warm and seems to take a long time to get to desired temp.When I look into the burner I don't see the flame increase from burning as I believe it should as I believe it has a step up gas valve. What should I do next?
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