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Geezer 911
Trainee


Joined: 14 Aug 2017
Posts: 67
Location: Essex Boy


PostPosted: Wed Aug 22, 2018 6:46 pm    Post subject: Smelly air conditioning/fan and heater Reply with quote

Evening all

Last week I noticed my air con and heater was blowing out a foul odour out of the vents. I called up design 911 for some advice and they recommended purchasing an A\C treatment called Viro One Shot. It got delivered yesterday and followed the instructions ( turn off aircon and have fan on recirculation) which I did. After the treatment It worked straightaway and there was no foul odour coming from the fan anymore. Brilliant. I also brought new cabin filter and swapped it in too.

This evening I was driving home fromwork and turned on the aircon and the. smelly odour is back grrrrr. Has anyone experienced this? I was going to purchase some more One Shot and repeat the process keeping the aircon on this time. Before I do this does anyone have any other suggestions to solve this issue?

Cheers
.
 
  
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deMort
Zolder


Joined: 21 Mar 2015
Posts: 5359
Location: Brighton


PostPosted: Wed Aug 22, 2018 7:08 pm    Post subject: Reply with quote

With the aircon treatments i use you have the a/c off , fan speed 3 and on recirc mode .

All you are trying to accomplish is the vapour being drawn through the matrix .

One thing i would check though .. have a look at your pollen filter .. its a common place for mouse nests .. mouse pee is NOT a pleasent smell .. take it from someone that actually wore a mask working inside a car once with this issue !!!!

Although in that case it was damp carpets due to the little buggers Laughing
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Geezer 911
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Joined: 14 Aug 2017
Posts: 67
Location: Essex Boy


PostPosted: Wed Aug 22, 2018 7:28 pm    Post subject: Reply with quote

Cheers Iain

Where is the pollen filter located on a gen 2? I changed the filter next to screen wash fluid in front passenger side bonnet?

Has there ever been a scenario where you have had to do a 2nd aircon treatment?
 
  
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HSC911
Zolder


Joined: 23 Jul 2014
Posts: 5579
Location: Bedford


PostPosted: Wed Aug 22, 2018 11:36 pm    Post subject: Reply with quote

Got to be Pollen filter, had the same issue on our Volvo nooo

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hot66
Hockenheim


Joined: 03 Mar 2007
Posts: 642
Location: North Yorkshire


PostPosted: Thu Aug 23, 2018 1:12 pm    Post subject: Reply with quote

had this on a couple of BMW's .. techs told me on my 7 series to run the aircon at full hot for a while ( i did 10 mins ) , then full cold for the same. The smell is supposed to be from bacteria build up. Running at teh extremes is meant to kill the bacteria and the smell ... seemed to work
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grbspeedster
Montreal


Joined: 11 Nov 2007
Posts: 538
Location: Rugby


PostPosted: Thu Aug 23, 2018 4:13 pm    Post subject: Reply with quote

When you pull the filter out spray some of the deodoriser inside the housing and ducts to kill off any bacteria before you put the filter in and complete the recirculation process. You can spray without latching the container if your careful
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deMort
Zolder


Joined: 21 Mar 2015
Posts: 5359
Location: Brighton


PostPosted: Thu Aug 23, 2018 5:58 pm    Post subject: Reply with quote

Geezer 911 wrote:
Cheers Iain

Where is the pollen filter located on a gen 2? I changed the filter next to screen wash fluid in front passenger side bonnet?

Has there ever been a scenario where you have had to do a 2nd aircon treatment?


You have already changed the pollen filter so its not that im afraid .

Ive never had to do a treatment twice but just to confirm you have the engine running windows closed , a/c off fan speed 3 and it must be on recirculation mode... leave for 20 mins.

The vapour will continually be drawn through the matrix and in theory kill the nasty bugs on it.

So if we say that has actually worked then what else ..hmm ..

Only 2 things i can think of .. do you have any mates that like to play practical jokes .. if so look under the seats for fish wrapped in newspaper .

Or do you have any mice where you park the car .. dead mice in a car will also smell and yes i have seen it .

Check under the seats anyways , i often see old fruit or even an old bottle of milk .. now that DID stink .
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Gottans
Monza


Joined: 25 Mar 2016
Posts: 211



PostPosted: Fri Aug 24, 2018 10:29 am    Post subject: Reply with quote

Can't help with the AC smell, I left it to the OPC to sort out but the worst thing to spill in your car is milk. I know someone who spilt a pint of milk in the front passenger footwell of his car, smelt putrid and stank for a very, very long time as it soaks through the carpet into the sound proofing where it sits festering.
 
  
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MarkC4S
Monza


Joined: 05 Jul 2016
Posts: 150



PostPosted: Fri Aug 24, 2018 7:39 pm    Post subject: Reply with quote

I thought these aerosol products were used with the A/C switched on?
 
  
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DucatiRob
Barcelona


Joined: 22 Jul 2015
Posts: 1380
Location: Milton Keynes

2006 Porsche 997 Carrera 2S

PostPosted: Fri Aug 24, 2018 10:19 pm    Post subject: Reply with quote

Maybe some of them work in different ways, i bought some from Hafords last weekend, let it off with the AC on full and left for 10 mins then left the doors open for a few mins more! Worked a treat, it's a pretty pungent odour for a day or two but that's now gone and the interior is really fresh now!
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deMort
Zolder


Joined: 21 Mar 2015
Posts: 5359
Location: Brighton


PostPosted: Sat Aug 25, 2018 3:42 pm    Post subject: Reply with quote

Instructions will be on the can .. the one we use is a/c off but some may be with it on .

I forgot in my last post but the one we use you set the temp to 21 but again i expect each type will have different instructions .

As Rob says though .. its hard to drive the car for a while afterwards without your eyes streaming lol .. very pungent smell .
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Poker2009
Imola


Joined: 09 Sep 2009
Posts: 868
Location: London


PostPosted: Wed Sep 12, 2018 4:40 pm    Post subject: Reply with quote

Last few days I have given serious thought to dropping 110k for a brand new 911 (I even specced one up online), as I am so fed up with the bad smelling aircon/fan/heater.

I have tried everything possible to resolve but it just seems to get worse..
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deMort
Zolder


Joined: 21 Mar 2015
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Location: Brighton


PostPosted: Wed Sep 12, 2018 6:55 pm    Post subject: Reply with quote

Perhaps if possible and before you sell it you might want to drop by my place in Brighton one weekend so i could just have a look .. you could book it in at were i work as thats closer .. but they charge im afraid.

Cant promise anything but if a Porsche Mechanic says sell it then at least you have a solid answer Very Happy
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Poker2009
Imola


Joined: 09 Sep 2009
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Location: London


PostPosted: Wed Sep 12, 2018 8:17 pm    Post subject: Reply with quote

Very generous offer - thankyou.

I have tried pushing a Wurth disinfectant product through the system with access through a pipe near the diagnostic port - most of it went on the carpet, and no idea where the rest ended up!

And have used dozens of Wurth "bombs". However, I have worked out the "recirc" button does not close the flap under the pollen filter, so is not working. I am not sure if it is just faulty, or whether messing with the wiring on the PCM 3 upgrade, has forced this fault.

What more can really be done? It is bacteria breeding inside the network of pipes, isn't it? Nothing can really get deep enough inside to kill that (and permanently)?
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moonigan
Newbie


Joined: 24 Apr 2017
Posts: 24



PostPosted: Thu Sep 13, 2018 1:43 pm    Post subject: Reply with quote

DucatiRob wrote:
Maybe some of them work in different ways, i bought some from Hafords last weekend, let it off with the AC on full and left for 10 mins then left the doors open for a few mins more! Worked a treat, it's a pretty pungent odour for a day or two but that's now gone and the interior is really fresh now!


I did the same with the Halfords one. It smells like cheap male deodorant and is really strong for the first few days but then settles down. I used the process posted by DeMort Thumb thumbsup
 
  
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deMort
Zolder


Joined: 21 Mar 2015
Posts: 5359
Location: Brighton


PostPosted: Thu Sep 13, 2018 6:34 pm    Post subject: Reply with quote

You do need the recirc to actually work as it keeps all the lovely gasses inside the car whilst it does its job .

Ok the problem as long as its not mice makeing a nest in the pollen filter or other places is a build up of bacteria on the outside of the A/C evapourator .. its like a radiator but inside the car .

In my pre Porsche days and back when i was young and keen i had a Rover in with a bad smell .. it WAS bad .. vomit like smell ..

I removed the evapourator and had it acid bathed .. stopped the smell all right .. these days i would just have used a bomb or replaced the evapourator.

Downside .. its a dash removal job to do that so not cheap.

Again i can offer to get an a/c bomb from work and set it off in your car whilst we have a coffee if it helps you keep the car ..

Ill see if i can fix the recirc .. if not ill use cardboard .

I do hate it when car faults results in a customer selling the car and moveing on to other makes .
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Poker2009
Imola


Joined: 09 Sep 2009
Posts: 868
Location: London


PostPosted: Thu Sep 13, 2018 6:54 pm    Post subject: Reply with quote

So I had half an hour this morning, and took the pollen filter out, and played with the recirc button, and have worked out the flap is infact opening and closing. With it closed, I used yet another Wurth bomb.

Hasn't made much difference.

I have been thinking I have not noticed any drips of water on the hot days when aircon was on full (once parked), so perhaps the drain is blocked?

I would infact consider changing the evaporator, if that meant the smell would go away for another 10 years - and it would give me pleasure to "acid bathe" the thing!
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deMort
Zolder


Joined: 21 Mar 2015
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Location: Brighton


PostPosted: Thu Sep 13, 2018 7:17 pm    Post subject: Reply with quote

If the drain has blocked you will have damp carpets .. not always easy to spot due to the large amount of foam under them .. a huge sponge basically.

It will be a mouldy type of smell .

Hard for me to say without looking im afraid , several things can cause these to smell and to be honest yours may well not be A/C related .
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Poker2009
Imola


Joined: 09 Sep 2009
Posts: 868
Location: London


PostPosted: Thu Sep 13, 2018 7:38 pm    Post subject: Reply with quote

DeMort - really appreciate all the tips - I will need to think about what to do.

The smell is only there for a few minutes when I turn the ac fans on. (however this few minutes seems to be getting longer lately).

It doesn't sound like it is a blocked drain then, and also the carpets are not wet. With the temp/fan console switched off completely, I get no smells.
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deMort
Zolder


Joined: 21 Mar 2015
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Location: Brighton


PostPosted: Thu Sep 13, 2018 7:40 pm    Post subject: Reply with quote

Let me know young man .. its a bit of a trip i agree but im kinda stuck on what else i can offer .
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