Fan runs with heat on

[Navistrpwr at aol.com]

>What's the outside temperature when this happens, and are you in "econ"
or "auto"?

It was in the mid 30's outside when I was checking the system out.  The fan
runs in 1st speed at any outside temperature, however, with the heat on in
auto mode.  In econ mode, the fan doesn't run.

>In Auto, the fan runs, because the ac clutch could become
active.

The ac clutch shouldn't come on in the 90 degree setting though, should it?
If that's true, then I don't see why the engine fan should run.  With the fan
constantly on, the engine doesn't get warm enough to produce good heat.  I
checked the heater valve, it's in the fully open position.  Also checked the
hoses going to and from the heater core, they were warm, so this rules out
the valve.  Just spent $120 at the dealer today for a new control head, that
didn't solve the problem either.  Running out of ideas and money...

Thanks again,
Ray