turbulator said:
Mine was making cinder-block clinkers... I changed out the rope gaskets on the front door and ash pan... It was burning laaaazy and sooting up the glass withing 1 hr or less... Found that my issue is the rope gasket... I must not have installed correctly or something but I made a slight adjustment a bit ago and she's doing ok now - nice tall white hot flame, but I am still seeing some smoke puffs roll across the glass so we shall see how this works...
16deg out w/o wind chill....running full bore level 5 with damper open full...holding 72 in the house - not too shabby.
My furnace was getting a dirty burn. It wasnt quite black, but dark brown is close enough. The bearings on the combustion blower could be heard when it spooled up and down (on/off), so I called Fahrenheit and spoke with there lead Senior Tech.
He informed me of a couple different updates. First was a higher flowing exhaust manifold, second was a new sail switch (on back of OAK, it opened sideways instead of up and down, which provided more flow. I ordered both the new high flow products and also a new combustion blower, along with several gaskets for the rebuild and some for the shelf.
I put these in a couple 2-3 weeks ago now and WOW!! I thought it ran good when I 1st installed it. I actually have to use the damper now. Its about 1/3-1/2 way closed. Otherwise its throwing almost whole pellets out of the pot!!
Have you called and seen if there are any High CFM or High altitude parts available, that will increase the total CFM through the unit?
Just a new blower and I would have been in business. But the sail switch and manifold helped tremendously. Yeah it was a couple hundred total, but being able to talk to "The Man" about these furnaces, gave me so much insight as to what to expect. After sending him pics and explaining everything in detail, he said it was a Textbook install and most everything but my Plenum coming off the unit was ideal (He said 45°'s would be best, but 90°'s are all I had).
I hope the gaskets help out the burn. I have replaced the Door gasket, Ash pan, Combustion blower, Exhaust manifold, Heat exchange clean out door, and the single worst one, was the Hopper gasket (have to remove top skin of furnace). It was blown badly.
Best way to check if you need one (on my unit/// If yours isnt meant to seal and latch, then disregard) is to open the hopper up when the unit is running. If your flame tends to one side or looks like devil horns (air blowing through the middle of fire) you probably need a replacement. Best to check that with a lower hopper level than normal.
Cheers...