>
> low double digits here in New England and I have noticed the Bus has a
> hard time maintaining heat to the interior.  My temp gauge sits on the
> lower edge of the red light.

So not a thermostat problem.  Splitting the bottom of the LED is about 90C
with an OEM sender.

In my experience, the front heater is good for your feet and keeping the
windshield clear.  The rear heater is the one that controls the overall
cabin temp in cold weather, even in front.  It not only gets first crack at
the hot coolant, it also is working with cabin air instead of air coming
directly from outside, so it gets more than one pass.

Yrs,
d