I have done this before, just want a refresher. Is there something online or if you have a procedure that you go by? I remember vacuuming and dumping out a flue pipe years ago. And I recall using a brush inside. Just trying to get my head together. They want $160 to do this in our area and fuel is high enough and I am on fixed income. I am mechanically inclined, have tools, vacuum cleaner, etc.
If you are cleaning out the exchanger, you should brush and vcacuum it out. If you are cleaning out the burner (pot) that the oil burns in, just put 1 or 2 mothballs in it when it is lit. It will cleaan out the firepot and chimney. Don't put in any more than 2 mothballs as you will cause a bad fire and the stove/furnace will dance around on the floor!
there will be door s on both side s you will have to remove to brush an clean but you must seal with gasket or high temp sealer