Does the Auto Re-circ really work?

Welton · Feb 21st, 2012, 11:43

I leave my re-circ mode in Auto and the system is supposed to 'sniff' the incoming air quality and apply full re-circ under a timed control if it needs to.

Thing is, I don't think it really works? I followed a stinky Diesel skip lorry yesterday and the system stayed on full fresh air and stank the cabin out! I had to push manual re-circ myself (poor me eh?).

I'm not really bothered whether it works or not but has anyone ever witnessed their's working properly?

v40bart · Feb 21st, 2012, 12:43

I was asking myself the same thing, how do we tell it is working?

Welton · Feb 21st, 2012, 13:29

Well if you push the manual recirc you can hear a change in the airflow flow down behind the dash, this is when it closes the outside air - it sounds a bit like a restriction in a way.

I had a BMW once with this feature and most owners said it's a bit temperamental/slow.

Ninja59 · Feb 21st, 2012, 13:31

mine is a little slow but on new models from 2010/11 it was a £100 option iirc.!

crankie · Feb 21st, 2012, 18:50

i noticed when i use the screen washers and you get that nice solvent smell, i nan hear my blower noise change

Bendolfc · Feb 21st, 2012, 19:36

Never noticed mine actually work and by the time I've managed to actually find the button it's usually too late and stinks anyway.

Nikesh · Feb 21st, 2012, 22:37

My auto re-circ works this way;-
1) watch out for nasty cars, vans, lorrys or bonfires.
2) then quickly try to hit the button twice to manual, without crashing by taking my eyes of the road to try to find the button, which is behind the gear stick.

Guru · Feb 21st, 2012, 22:41

Mine is a bit slow to react too, but I've found out by comparison that using a charcoal pollen filter, instead of those ordinary ones, helps in absorbing those "odors" and reduces their intensity and the time they linger about.

Feb 21st, 2012, 11:43	#1
Welton Premier Member Last Online: Sep 14th, 2021 17:03 Join Date: Feb 2009 Location: Market Harborough	Does the Auto Re-circ really work? I leave my re-circ mode in Auto and the system is supposed to 'sniff' the incoming air quality and apply full re-circ under a timed control if it needs to. Thing is, I don't think it really works? I followed a stinky Diesel skip lorry yesterday and the system stayed on full fresh air and stank the cabin out! I had to push manual re-circ myself (poor me eh?). I'm not really bothered whether it works or not but has anyone ever witnessed their's working properly? __________________ 2005 S40 T5 SE - Manual. Bilstein B4's. (For Sale) 2010 Citroen C4 1.6 HDi (bizarre Gearbox model). 2010 Renault Twingo (refreshingly simple) 2018 Infiniti Q30 1.6T Business Executive (what's this button do?)

Feb 21st, 2012, 12:43	#2
v40bart Master Member Last Online: Jun 14th, 2015 13:09 Join Date: Sep 2006 Location: London	I was asking myself the same thing, how do we tell it is working? __________________ 2008 V50 2.0 D, silver, off-black leather interior, plod spec 320mm brakes and suspension, says 140 ps on the sticker but flies like proverbial off a shovell. NICE...

Feb 21st, 2012, 13:29	#3
Welton Premier Member Last Online: Sep 14th, 2021 17:03 Join Date: Feb 2009 Location: Market Harborough	Well if you push the manual recirc you can hear a change in the airflow flow down behind the dash, this is when it closes the outside air - it sounds a bit like a restriction in a way. I had a BMW once with this feature and most owners said it's a bit temperamental/slow. __________________ 2005 S40 T5 SE - Manual. Bilstein B4's. (For Sale) 2010 Citroen C4 1.6 HDi (bizarre Gearbox model). 2010 Renault Twingo (refreshingly simple) 2018 Infiniti Q30 1.6T Business Executive (what's this button do?)

Feb 21st, 2012, 22:41	#8
Guru Premier Member Last Online: Oct 25th, 2023 07:46 Join Date: Feb 2009 Location: Between chair and keyboard	Mine is a bit slow to react too, but I've found out by comparison that using a charcoal pollen filter, instead of those ordinary ones, helps in absorbing those "odors" and reduces their intensity and the time they linger about. __________________ Volvo S40 2.0D momentum \| 100kw/136bph \| 2005 \| Euro III \| 49mpg \| Electric silver

Feb 21st, 2012, 13:31	#4
Ninja59 Probably Akita's Toyboy.. Last Online: Dec 27th, 2023 22:24 Join Date: Jul 2010 Location: A House.	mine is a little slow but on new models from 2010/11 it was a £100 option iirc.!

Feb 21st, 2012, 18:50	#5
crankie Senior Member Last Online: Aug 19th, 2016 16:24 Join Date: Mar 2011 Location: manchester	i noticed when i use the screen washers and you get that nice solvent smell, i nan hear my blower noise change

Feb 21st, 2012, 19:36	#6
Bendolfc Premier Member Last Online: Apr 25th, 2024 12:10 Join Date: May 2010 Location: Liverpool	Never noticed mine actually work and by the time I've managed to actually find the button it's usually too late and stinks anyway.

Feb 21st, 2012, 22:37	#7
Nikesh I've got a new White S40 Last Online: Apr 28th, 2016 15:41 Join Date: Mar 2011 Location: Braintree, Essex	My auto re-circ works this way;- 1) watch out for nasty cars, vans, lorrys or bonfires. 2) then quickly try to hit the button twice to manual, without crashing by taking my eyes of the road to try to find the button, which is behind the gear stick.

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