On Feb 7, 2013, at 1:20 PM, Automatic digest processor wrote:

> The issue *might* also be that the material used to seal the air
> control flaps in the heat exchange box, are starting to show their age
> and allow air flow even when they're closed. If not....
> 
> David's post should make things clear.
> 
> Did your Westy c/w an owners manual? If not, IIRC, I have an owners
> manual in my '88 Westy.
> 
> Neil.

David's post was excellent; thanks.  I have an owner's manual.  Some things are crystalline, some I can't understand until someone rephrases them.

It sounds as though air is coming from outside BECAUSE I have the third lever pushed all the way to the left, even though there is no fan on.  Easy enough to test/fix.  How would I know if the problem is, instead, deteriorating control flaps?  And, should I care?

Lisa Bloch
lab@rynth.org
'89 camper 2.1L automatic