Update: Two days and $400 later I have heat and a new appreciation for the incontinence of PHAC corporations and for the erudition and arcane knowledge of the laborers in that field.
After visiting seven different practitioners of the art and craft of Coleman heater repair and purchasing the wrong replacement motor, we finally found a practitioner of the PHAC art who recognized that part numbers and model numbers are meaningless: all is determined by serial number. It’s like the doctrine of predestination.
But even a wizard can slip up and repair would have been delayed another day had a second PHACartist not contributed a little known bit of expertise: the Golden Grommets without which the motor could not be reinstalled.
These little double-ended screws with rubber in the middle cost $5 each and either five or six of them are required, depending again on serial number.
When I murmured about the cost of them, he said that I should be glad that the motor was going into a heater and not an air conditioner or refrigeration unit because those grommets, identical except that the steel parts were made of brass, were $20 apiece.
I asked if they can realize that steel will corrode in the condensation of refrigerated air, why can’t they realize that rubber will bake to brickosity in a furnace vent and make the softer parts of silicone?
He just shook his head, like all practitioners of the dark arts, he knew when he must bow down to Mystery.