Hi Rich.  For the rear heater there is a 3 speed fan switch next to 
the steering column on the right side.  This controls the fan speed 
only.  Under the rear seat there is a valve that you can adjust for 
warm, and warmer air.  It's quite efficient.  Move the lever to the 
front of the van for maximum heat.

Hope this help.
Harry.

> 
> OK, so I have only had my '89 Westie for two days, but you'd think that by 
> now, having read the appropriate section of the manual numerous times, that 
> I'd be able to figure out the convoluted climate controls.  No such luck, so 
> I have a stupid question for those in the know:
> 
> First of all, my Vanagon has A/C but no auxiliary heater.  My question: How 
> the heck do I get heat to come out of vent under the back seat?  The heat up 
> front is just fine thank you, but those sitting in the back are finding 
> their feet to be a bit numb.
> 
> Signed,
> 
> Cold feet in Canada
> (Rich Jones  richj@watcom.com)
> 
> 
----------------------------------------------------------
Burnaby, British Columbia CANADA
'90 Syncro Westfalia  email: hyates@bcit.bc.ca
'87 Golf Diesel       WWW:   http://www.bcit.bc.ca/~hyates