comfortmaker furnace not heating


  #1  
Old 11-10-08, 04:37 PM
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comfortmaker furnace not heating

Our house is about 14 years old and the gas furnace is original to the house to the best of our knowledge. It is a comfortmaker furnace. We aren't sure the model number. We think it may be RPJII. The furnace is getting electricity because the unit will come on and the blower will start to blow air (room temp). We can watch the furnace glow orange and we hear a click like it should be lighting. After about 30 seconds the light goes out though without the furnace ever getting warm. The blower continues to blow but the air stays cold. After a little bit it'll glow orange again but it just repeats over and over. The air never gets warm and furnace stays cool to the touch. Any thoughts about what we can do to fix this?
 
  #2  
Old 11-10-08, 06:28 PM
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Make sure the gas is on, burners are clean and gas valve switch is in the on position. If you have a smartvalve, call for service.
 
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Old 11-10-08, 06:41 PM
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The gas is on in the rest of our house. How do I check to make sure that it's on to the furnace? The gas valve is in the on position and the burners are clean. From googling we think the flame sensor might be dirty but we are having trouble locating it. How do we tell if we have a smart valve?
 
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Old 11-10-08, 07:45 PM
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the flame sensor should be mounted over the burners, like the ignitor is. Look at the other burners and see if you see a thin metal rod sticking down into the flame.

blue3
 
  #5  
Old 11-21-08, 07:47 AM
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Check the rubber hose inside the unit that the gas travels through. There might be condensation in there that is preventing the flow of gas to stay ignited. I do not know the names of the parts, but I have had the exact same problem as you describe, and it is based on the condensation that forms in that rubber tubing.
 
 

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