Reversing the wires is not recommended. I had the same problem as you, and DMC Joe explained to me that when the wires are reversed, the motor could cause a short circuit if anything metal touches it. It's unlikely that anything would, but it is possible... especially if you are doing something under there with a screwdriver. Anyway, I have a better fix. It's a little more difficult, but extremely effective. You don't have to switch any wires whatsoever. If you are interested, let me know and I'll give you instructions. ---Dan > --- In dmcnews@xxxxxxxxxxx, Stephen Jarvis <jarvist@xxxx> wrote: > > I have had a longstanding problem with the minimal volume of air > coming from > > the interior air vents even with the fan switch on the highest > position. The > > problem had once been diagnosed as the fan running backwards, and I > finally > [snip] > > in the right direction? Or the wiring switched? Or is a new unit > necessary?? > > You can just reverse the wires. This was covered in several > discussions a couple of years ago (search the archives on "blower"), > but no one has mentioned it in a while. Apparently it's easy to hook > it up backwards, and it often happens (blame the prior owner). No > need to replace anything. > > Dave