2005 Camry XLE - Recirculate Has Mind of its Own

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Old 28 Aug 2013, 03:46 pm   #1 (permalink)
Scott J
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Default 2005 Camry XLE - Recirculate Has Mind of its Own

This Camry has an automatic climate control system which I never use. Yet,
the recirculate on/off switch seems to be controlled automatically even
though Auto on/off setting is off. Is this normal? Is there a setting to
change this? About the only time I switch to recirculate is temporarily
when I encounter, for example, a vehicle spewing out smoke.

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Old 28 Aug 2013, 05:57 pm   #2 (permalink)
Jeff Strickland
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Default Re: 2005 Camry XLE - Recirculate Has Mind of its Own


"Scott J" <me@privacy.net> wrote in message
news:kvlnj5$t91$1@dont-email.me...
> This Camry has an automatic climate control system which I never use.
> Yet, the recirculate on/off switch seems to be controlled automatically
> even though Auto on/off setting is off. Is this normal? Is there a
> setting to change this? About the only time I switch to recirculate is
> temporarily when I encounter, for example, a vehicle spewing out smoke.


There's a good chance you want to recirculate when the AC is on. If you do
not recirc with AC, then you are always putting max cool on hot air from
outside, but if you recirc, then your car only has to cool air that it has
cooled already. In theory, this would shorten the duty cycle of the
compressor, or shorten the ON Time, which should translate into lower fuel
costs. You do not want recirc when the system is set to the Vent Mode where
the goal is to draw in 100% fresh air. You might do this on a day when the
temps are moderate to cool, and you are not wanting to either heat or cool
the air that comes in.

In my cars (none have an Auto Mode), I like to set the vents (dash air)
during our moderate winters to fresh air, and I put a window down somewhere
that causes the air to leave the car as easily as it gets in, and I set the
fan speed to low so there is always air moving, and usually fresh air. In
summer, then I set the AC to Max, which is the recirc setting, and when the
system finally blows cold, then I close the windows so the cool air stays
inside.


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Old 30 Aug 2013, 02:15 pm   #3 (permalink)
Scott J
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Default Re: 2005 Camry XLE - Recirculate Has Mind of its Own

"Jeff Strickland" wrote:


"Scott J" <me@privacy.net> wrote in message
news:kvlnj5$t91$1@dont-email.me...
> This Camry has an automatic climate control system which I never use. Yet,
> the recirculate on/off switch seems to be controlled automatically even
> though Auto on/off setting is off. Is this normal? Is there a setting to
> change this? About the only time I switch to recirculate is temporarily
> when I encounter, for example, a vehicle spewing out smoke.


There's a good chance you want to recirculate when the AC is on. If you do
not recirc with AC, then you are always putting max cool on hot air from
outside, but if you recirc, then your car only has to cool air that it has
cooled already. In theory, this would shorten the duty cycle of the
compressor, or shorten the ON Time, which should translate into lower fuel
costs. You do not want recirc when the system is set to the Vent Mode where
the goal is to draw in 100% fresh air. You might do this on a day when the
temps are moderate to cool, and you are not wanting to either heat or cool
the air that comes in.

In my cars (none have an Auto Mode), I like to set the vents (dash air)
during our moderate winters to fresh air, and I put a window down somewhere
that causes the air to leave the car as easily as it gets in, and I set the
fan speed to low so there is always air moving, and usually fresh air. In
summer, then I set the AC to Max, which is the recirc setting, and when the
system finally blows cold, then I close the windows so the cool air stays
inside.
____________________________________

Thanks for replying. Maybe I phrased the question poorly. What I'm trying
to find out is whether my system has a defect or whether it is designed to
function this way. My experience in other cars is nothing happens with the
recirculation function until you manually turn it on or off, unless you are
in the AUTO mode. In the AUTO mode, the recirculation function (as well as
fan speed, etc.) adjusts automatically depending in the inside and outside
temperature.

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Old 30 Aug 2013, 02:44 pm   #4 (permalink)
Geoff Welsh
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Default Re: 2005 Camry XLE - Recirculate Has Mind of its Own

Scott J wrote:
> "Jeff Strickland" wrote:
>
>
> "Scott J" <me@privacy.net> wrote in message
> news:kvlnj5$t91$1@dont-email.me...
>> This Camry has an automatic climate control system which I never use.
>> Yet, the recirculate on/off switch seems to be controlled
>> automatically even though Auto on/off setting is off. Is this normal?
>> Is there a setting to change this? About the only time I switch to
>> recirculate is temporarily when I encounter, for example, a vehicle
>> spewing out smoke.

>
> There's a good chance you want to recirculate when the AC is on. If you do
> not recirc with AC, then you are always putting max cool on hot air from
> outside, but if you recirc, then your car only has to cool air that it has
> cooled already. In theory, this would shorten the duty cycle of the
> compressor, or shorten the ON Time, which should translate into lower fuel
> costs. You do not want recirc when the system is set to the Vent Mode where
> the goal is to draw in 100% fresh air. You might do this on a day when the
> temps are moderate to cool, and you are not wanting to either heat or cool
> the air that comes in.
>
> In my cars (none have an Auto Mode), I like to set the vents (dash air)
> during our moderate winters to fresh air, and I put a window down somewhere
> that causes the air to leave the car as easily as it gets in, and I set the
> fan speed to low so there is always air moving, and usually fresh air. In
> summer, then I set the AC to Max, which is the recirc setting, and when the
> system finally blows cold, then I close the windows so the cool air stays
> inside.
> ____________________________________
>
> Thanks for replying. Maybe I phrased the question poorly. What I'm
> trying to find out is whether my system has a defect or whether it is
> designed to function this way. My experience in other cars is nothing
> happens with the recirculation function until you manually turn it on or
> off, unless you are in the AUTO mode. In the AUTO mode, the
> recirculation function (as well as fan speed, etc.) adjusts
> automatically depending in the inside and outside temperature.


Without regard to any AUTO function, as that seems to be what you are
/not/ asking about.

I've seen: 1.cars where the recirc indicator comes on every time you
turn-on the AC manually, 2. cars where the recirc indicator does not
come on every time you turn-on the AC manually, so I then press recirc.

If it does the same thing every time, it's normal.

IME, of course
GW
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