Combustion Air or Heat Exchanger Exhaust?
#1
12-12-13, 06:01 AM
Combustion Air or Heat Exchanger Exhaust?
On this old Coleman Standing Pilot furnace (Model 7956-856)... is the flat, curved part for combustion air intake to the heat exchanger, or is it the exhaust part of the heat exchanger? Both? Pic below.
Looked at an online parts illustration page for this model, but the entire assembly was just labeled as heat exchanger.
Does it get hot? (the flat, curved part)
There is a rectangular duct attached to the right side of the furnace cabinet, but no combustion air motor.
I had assumed this flat curved part was exhaust, but someone told me it was intake combustion air.
Looked at an online parts illustration page for this model, but the entire assembly was just labeled as heat exchanger.
Does it get hot? (the flat, curved part)
There is a rectangular duct attached to the right side of the furnace cabinet, but no combustion air motor.
I had assumed this flat curved part was exhaust, but someone told me it was intake combustion air.
#2
12-12-13, 08:26 PM
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I believe if yiou look down into the top of the heat exchanger connection, you will see an inner & outer pipe. The inner pipe is exhaust & the outer is combustion air. Do you have a model number of the heater?
#3
12-12-13, 10:34 PM
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I had assumed this flat curved part was exhaust
#4
12-13-13, 12:58 AM
I believe if yiou look down into the top of the heat exchanger connection, you will see an inner & outer pipe. The inner pipe is exhaust & the outer is combustion air. Do you have a model number of the heater?
There is a rectangular duct attached to the side of the furnace cabinet . I thought maybe that was the combustion air intake.
#7
12-13-13, 08:23 PM
I recall that style of heat exchanger in a Coleman mobile home fnc a few years back that had a boing like ductwork when it cooled down. We changed it out under warranty and it was a bear because it was in a tight closet and screws have to come out from the outside of the cabinet. Might have been easier just to tear it out of the closet.
#8
12-14-13, 07:41 AM
Thx tinman~
What would be an approximate price to replace the heat exchanger, labor included. I assume the upper flat curved part and the bottom barrel-shaped part of the HE is all one piece, correct?
What might it cost for a new furnace installation? Model 7956-856. If they don't make it any more, one with an HSI ignition.
What would be an approximate price to replace the heat exchanger, labor included. I assume the upper flat curved part and the bottom barrel-shaped part of the HE is all one piece, correct?
What might it cost for a new furnace installation? Model 7956-856. If they don't make it any more, one with an HSI ignition.
#9
12-14-13, 10:23 AM
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It would likely cost more to replace the heat exchanger than the entire furnace.
In most cases the furnace has to be removed, taken apart, part replaced, then reassembled & reinstalled. The labor would eat you for lunch.
In most cases the furnace has to be removed, taken apart, part replaced, then reassembled & reinstalled. The labor would eat you for lunch.
#10
12-14-13, 10:45 AM
I agree Grady. If it hadn't been warranty, we wouldn't have touched the job. Not cost effective. As far as a new one cost, I haven't priced one in a couple years. Prices vary with different parts of the country and it wouldn't be fair to say what it costs here versus your area. Sorry
