Originally Posted by pt1949
Thanks? Just kidding - how expensive is expensive? Is it easier to change blower if you change furnace also or is it all one piece basically?
To change the blower you will first have to remove the furnace itself. That can be fairly easy, or very difficult and that totally depends on your specific Airstream. They are all different. But it involves removing the exterior vent plate, and the hidden screw which holds the vent to the furnace, removal of the gas line, and the electrical wires, plus the heating ductwork. Then you have to be able to get it out of the cabinet it is installed in. That is where your specific Airstream can make things easy, or difficult.
Once you have the furnace out, you will then need to totally disassemble it as the blower motor is sandwiched between two blower wheels, the one for combustion air, and the one for moving air through the coach. Lots of screws, gaskets, wires and so on. Removal of the fan wheels requires long allen head T wrenches. BTW, I think the blower motor is in the $150 range but not at all sure about that number.
Then reassembly.... and re install it back into the trailer.
If you do it yourself, of course the labor is "free" and all you have is the cost of the motor. Having someone do it will be quite expensive due to the hours involved. And you still have an old furnace then, with a new motor, but combustion chambers rust out, circuit boards fail and so on. And each time you need to repair something, you have to go through the entire disassembly process again.
I guess that is why I would replace it with a new one if it were mine. You still have to remove and replace the furnace in the coach, but then it should last another 15 years or so. Say it is $600 for a replacement. Over 15 years that is $40 a year. Is that a lot, or not to you. I cannot say but you can.