E36 heater/air conditioner air flow question

i have a 1998 .
the heater and air flow is cut by about a third when in use as
opposed to using outside air vent .

is this normal ?
i already replaced the microfilter.

i do get air flow but its reduced.

First off, what? Do you mean the recirculation mode vs std? (recirc mode=
you push the button that has the pictogram of a car and the looping arrow)
The only use I have found for recirc mode, is if I'm following a stinky
something, or there is a lot of moisture in the air and the windows are
fogging. When clear I switch back to fresh air. Please be as specific as
possible, You will get no help if people don't understand the problem.

Rich

"news" > wrote in message
news:j8Zad.3593$wV6.1850@trndny06...
>i have a 1998 .
> the heater and air flow is cut by about a third when in use as
> opposed to using outside air vent .
>
> is this normal ?
> i already replaced the microfilter.
>
> i do get air flow but its reduced.
>
>

how much does the airflow get reduced if the air
intake is through the microfilter ?

"Richard Sperry" > wrote in message
...
> First off, what? Do you mean the recirculation mode vs std? (recirc mode=
> you push the button that has the pictogram of a car and the looping arrow)
> The only use I have found for recirc mode, is if I'm following a stinky
> something, or there is a lot of moisture in the air and the windows are
> fogging. When clear I switch back to fresh air. Please be as specific as
> possible, You will get no help if people don't understand the problem.
>
> Rich
>
> "news" > wrote in message
> news:j8Zad.3593$wV6.1850@trndny06...
> >i have a 1998 .
> > the heater and air flow is cut by about a third when in use as
> > opposed to using outside air vent .
> >
> > is this normal ?
> > i already replaced the microfilter.
> >
> > i do get air flow but its reduced.
> >
> >
>
>

All airflow is through the microfilter, and it gets real nasty. Buy a
Bentley workshop manual.


"news" > wrote in message
newsrUbd.437$Ug4.400@trndny01...
> how much does the airflow get reduced if the air
> intake is through the microfilter ?
>
> "Richard Sperry" > wrote in message
> ...
>> First off, what? Do you mean the recirculation mode vs std? (recirc
>> mode=
>> you push the button that has the pictogram of a car and the looping
>> arrow)
>> The only use I have found for recirc mode, is if I'm following a stinky
>> something, or there is a lot of moisture in the air and the windows are
>> fogging. When clear I switch back to fresh air. Please be as specific as
>> possible, You will get no help if people don't understand the problem.
>>
>> Rich
>>
>> "news" > wrote in message
>> news:j8Zad.3593$wV6.1850@trndny06...
>> >i have a 1998 .
>> > the heater and air flow is cut by about a third when in use as
>> > opposed to using outside air vent .
>> >
>> > is this normal ?
>> > i already replaced the microfilter.
>> >
>> > i do get air flow but its reduced.
>> >
>> >
>>
>>
>
>