The rear (underseat) heater has a shutoff valve for coolant (heat)
control.  Pulled forward it's open for heat.  Pushed aft it's shut.
That valve is, of course, only in one line so the heater core is always
subject to cooling system pressure.

Mike

Dr.Chris wrote:
> http://www.vanagon.com/info/articles/owners-manual/vent-controls.html
>
> Chris
>
> On 11/11/06, garyowen <garyowen@magma.ca> wrote:
>
>> Can anyone tell me where to find explanation of heat
>> and airflow for camper.
>>
>> Purchased copy original manual expecting it to be in there
>> but only discusses fridge etc.
>>
>> I know which lever is heat and which is defrost but exact
>> use of two fan switches, front doors vents open/close
>> purpose. Think its to help rear ventilation.
>>
>> Rear vents and finally position of lever for under seat
>> heater to turn off and on.
>>
>> GO
>>
>