So I've replaced my front heater core and fan;  All done with dash completely re-installed. During the work I tested the fan before installing and thought I had been careful to install it properly.  Don't think there is any way to install fan upside down but very possible that I wired the fan backwards.  Lots of spinning when I switch it on but little to no air flowing.  Vents all manipulated and seem to work.  If I mis-wired that fan would it turn backwards?  �And bigger question, if I exchange the hot with the ground can I make the thing work properly?  Is that resistor capable of working if I switch the wires.  I feel horrible and dread tearing it all apart to rewire a single connector.

Trevor Reynolds
'91 2wheel drive AT Westy "SEN"
http://westfalia-91restore.blogspot.ca