Hi!
I have a 1973 VW Beetle.
The other day I was inspecting the add on blower fans for my heater.
I hardly ever used them, since I was concerned with the current draw on the battery.
When I picked it up to remove one, the outer casing crumbled in my hands.
The fan motor itself appeared to be OK though.
These were not the Barney's Imports heater recalculater blowers. These were the Atwood brand which were a lot quieter than the Barney's blowers.
They were mounted under the rear seat with a larger than original heater hose connected to them.
I had installed them in July of 2000 and the fell apart in August 2005.
Anyway, the point I am trying to make is, I should have inspected these blowers at least twice a year and replaced them about every four years.
My stock heater with flaps and thermostat works good enough and I do not need these blowers.
Hope This Helps! JP 73vwbeetle