Most likely a dead thermostat. Thermostats will fail closed, causing an
over heat condition, and then they will fail open, prevent ting the
engine from warming up. I have had it happen both ways. Change the
thermostat.

But watch out. Some themostats - even when FLAPS says they work, will
not work in ght Vanagon. Get a thermostat fromone of our list
vendors.Safer that way.

John Rodgers
88 GL Driver

Jeff Gellman wrote:

> my heating system decided to not blow out hot air on the day it is
> into the single digits...the only thing i can think of that i did is
> last week i filled up my antifreeze and after about 1 quart realized
> that i did not dilute it with 50/50 water to antifreeze, so is it
> possible that too much concentrated coolant is doing this...my engine
> heat gauge stays way below cold and does not even creep up after
> driving for an hour
>
> Jeff
>
>