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craignoda
Oct 22, 2008, 07:25 PM
I have a colemann evcon furnace. I electric ignitor starts to glow , gas is released and ignites. Then the heating coil starts to stop glowing and the gas goes out and this happens 3 times and will not heat the house. What could be wrong.
MarkwithaK
Oct 22, 2008, 08:06 PM
More than likely you have a dirty flame sensor. VERY common problem. If you look on the side opposite the hot surface igniter you should see what looks like a small rod with white porcelain and one wire going to it. This is your flame sensor. Remove it being very careful not to crack the porcelain. Lightly sand the rod and reinstall.
hvac1000
Oct 22, 2008, 10:21 PM
I have a colemann evcon furnace. I electric ignitor starts to glow , gas is released and ignites. Then the heating coil starts to stop glowing and the gas goes out and this happens 3 times and will not heat the house. What could be wrong.


See attached
one style of flame sensor