[s-cars] Windshield fogs up in cold weather & AC is off

[Joshua van Tol]

Could be that the recirc flap isn't opening.

On Nov 17, 2012, at 11:21 PM, Thomas Rodriguez <trodri69 at gmail.com> wrote:

> Now that the weather is cold my windsheild fogs up when I run the
> heater or defroster.  I believe this is because the AC is not
> operating when the outside air temperature is cold, so it doesn't
> remove the moisture from the air before it passes through the heater
> core.  It is my understanding that the AC is supposed to run in the
> winter expressly for this purpose.  The AC indicator light on the HVAC
> control panel is unlit.  If I push the AC button on the control panel
> the indicator light illuminates as long as I hold the button down, but
> goes out when I release the button.  I am confident the fogging is not
> due to a coolant leak into the HVAC system; I recently replaced the
> heater core and there is no coolant odor inside the cabin and no drop
> of coolant level in the reservoir.  The heater works great (aside from
> the moisture) and the AC worked great during the summer.  Am I correct
> that the AC should be operating in concert with the heater &
> defroster?  Any tips on how to correct this?
> 
> Thanks,
> Tom Rodriguez
> '95 S6
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