Temperature on A/C won't lower

[APFS]

If I drive to work in the morning with the heat on, then return to the car that evening to go home and try to blow cold air, the temperature won't lower! The car has been brought back to the dealership who say they cannot find a fault. It will do this for a week or so then go back to working normally! Any Suggestions???

[ILOVEMYSUPERB]

Open the windae 

Edited 7 June, 2017 by ILOVEMYSUPERB
Typo

[APFS]

That's a little difficult if you're doing 70mph on the motorway and it's raining!!!

[Rainmaker]

When you say it won't lower, do you mean the numbers on the dial stay fixed? Or do you mean the numbers change but hot air still comes out? If the latter, I have that intermittent fault also. It seems to be a software bug, and you can temporarily fix it easily with a reset/recalibration of the AC system. The length of time it stays fixed varies randomly. Mine has lasted a couple of months this time, so far, but will inevitably recur eventually. To reset the system:

 

With the engine running, at the same time hold down the AC button (the bottom one, underneath 'Auto') and also the 'direct air at the passenger's faces' button (somewhere near the middle of the row of buttons). Do this for several seconds, until the lights on the buttons will begin to flash alternately. Once this is triggered the fans will cycle from 0% to 100% on their own and through various settings of air blowing. This resets and recalibrates the system and the problem will disappear... For now. 

 

Even if your problem is something else (i.e. the displayed temp won't change, or something different entirely) a reset as described above may well still help fix it. Good luck.

Edited 7 June, 2017 by Rainmaker

[Speedman]

If the above doesn't work can you drive to the dealer while the problem is there?

[BennyS3]

Did you get this problem fixed? My air conditioning has packed in. Car is just six months old. It happened last week.

 

I drove the car as normal during the day. I switched off the car with the a.c running as normal. A few hours later when I started it as normal without adjusting any controls I noticed a new sound and that it was coming from the air vents. A sort of hissing sound. I turned off the fans and the sound stopped. I turned it back on, the sound came back. So I left the fans on but switched off the a.c which caused the hissing sound to stop. I finished my journey and noticed that the hissing sound had stopped but the air coming out of the fans was not the usual cold temperature. So now, the low temperature with a.c on is the same temperature at 16°/17°. No difference. I brought into the garage and was told the a.c gas was gone. Zero pressure in the a.c unit. It's booked in again next Monday for a further look. I did the usual reset etc but it's definitely a hardware problem, not a software. No difference

 

I'm not impressed....

Edited 6 July, 2017 by BennyS3
I left out the reset info

[SportlineBri]

Hi ,

My 6 month old superb superb sportline has developed a hvac problom also , I have tri zone air conditioning and the rear passenger  zone vents are blowing out hot air constantly irregardless of the temp setting on the rear display or whether the air conditioning is on or not.

I also think the front air conditioning low temperature isint  as cold now as it used to. Have tried everything in the settings Inc the reset as mentioned here to get it to work normally but to no avail , the central arm rest cooler box is roasting inside too even with the dial set to 0.

Had it back to the dealer yesterday to diagnose ,they said there is a hvac fault logged but they have to get confirmation from skoda as to what to do to repair so I'm waiting for a reply from them .

Not impressed at the thought of possibly having  the interior ripped out to repair the problom at all.

[dg360]

Given the timeline, did you use it at all though the winter?  Or have we come to the first hot days and you are using it for the first time?

[BennyS3]

17 minutes ago, dg360 said:

Given the timeline, did you use it at all though the winter?  Or have we come to the first hot days and you are using it for the first time?

I don't know who you are asking this question of dg360, but in my case, I have used the a.c in winter and summer in all the cars I owned and never had any issues. 

When I brought it into the first skoda garage (where I bought it) they couldn't fix it as the superb has a new type of coolant gas system and their garage machines hasn't been updated to deal with. So they rang other local(ish) Skoda dealers that have the new machine to test it and I'm booked into see them instead. 

[FelisBengalensis]

R134a is being replaced with 1234yf as from the beginning of 2017 so I guess not everyone has caught up yet.

[Ant1975]

There is definately an issue with the aircon. The blowing hot air issue (and I mean really hot air) happened to me (65 SE Exec Estate) about a year ago, I self fixed with a reset (as above). It happened again about a month ago, with a drive through Spain and Portugal coming up this was less than optimal! I took it in to Murray Skoda who did a complete software update and all seems well now. It does however take about 30 min to get truly cold, I drove a mondeo recently which was icy inside a minute!

[FelisBengalensis]

Mine takes a couple of minutes if it has been in the sun all day.  Definitely should not take 30 mins.  Sounds as if your Dealer failed to find the proper cause and fix it.

[dg360]

On 7/7/2017 at 10:46, BennyS3 said:

I don't know who you are asking this question of dg360, but in my case, I have used the a.c in winter and summer in all the cars I owned and never had any issues. 

When I brought it into the first skoda garage (where I bought it) they couldn't fix it as the superb has a new type of coolant gas system and their garage machines hasn't been updated to deal with. So they rang other local(ish) Skoda dealers that have the new machine to test it and I'm booked into see them instead. 

I think you guessed where I was going with it.  A lot of people don't use AC in the winter.  I was chatting with two colleagues (~40) in work the other day, neither realised that AC massively helps demisting in the winter or that not using the system prevents lubricant from circulating and could lead to leaks etc.  I think there is a general feel that putting the AC on and then dialling the heater up at the same time will lead to some sort of cataclysmic battle behind the dash as cold fights hot, or perhaps it falls into the category of crossing the streams.  Total protonic reversal will not occur.  Promise.

My father just won't listed to reason on this.  He has decided that the AC button is the route to economic ruin and won't press it.  I keep warning him that in doing so, he makes it more likely that he'll have expensive problems down the line.  He does ~3k per year and insists on driving a Suzuki econobox with a childish name and a kenwood chef under the bonnet "for the mpg".  He could drive an American V8 muscle car and the difference would be a few hundred quid a year.  Sigh.  But I digress.

[FelisBengalensis]

In days of old the ac compressor used a lot of engine power to run.  My old boss had a 1980's V12 Jag XJS and at idle you could almost stall the engine just by turning the ac on.  I have not noticed a significant fall in the mpg by running it, and given the lubrication properties of the fluid, I never turn mine off.  Modern systems need to be used at least once per month to keep everything in good order.  BMW told me that gas losses are roughly ~15%/yr and a lot more if the system is not being used, plus you run the risk of premature compressor failure.  That was on a 2004 X5 and I would expect things to be a little better today.

[Rebelred]

I have an issue with my air con also, I have to turn the dial up to at least 22 Degrees to get any heat to come out of the vents, I did a Diagnostic scan & a fault 'Active Radiator Shutter 1 Stuck Open' is coming up. I havn't gone to Skoda yet, but apparently it's a common fault with Audi's & were replaced under warranty.

the hot air blowing out the vents no matter what temp was set happened me last year but the reset tip as Rainmaker suggested worked at the time.

[SportlineBri]

Hi,

Has anyone recently experienced this issue or similar?

My 6 month old sportline has developed this issue from the rear passenger vents only .( hot air regardless of the temp setting)

It's been in to the dealers for a diagnosis, they have told me that the complete airbox assembly behind the dashboard to be replaced ! 

Apparently the part will take several weeks to become available as there is no stock of them in Europe atm .

Not really happy with this at all given the amount of stripping that will have to be carried out on the dashboard and trim , I'm fearful of rattles and squeaks afterwards and possible trim breakage .

Has anyone heard of this repair being carried out ?

[FelisBengalensis]

Probably find that Škoda only authorise a complete assembly replacement as the sub-components are not available individually.

[SkodaNP]

Hi, similar problem with my air-conditioning on a 2016 reg, blowing out hot air instead of cold. A/C button on but nothing. Tried the reset, no luck.

Did anyone get a solution to your problems listed on this topic?

Much appreciated.. thanks.  👍

[SkodaNP]

On 09/04/2020 at 12:10, SkodaNP said:

Hi, similar problem with my air-conditioning on a 2016 reg, blowing out hot air instead of cold. A/C button on but nothing. Tried the reset, no luck.

Did anyone get a solution to your problems listed on this topic?

Much appreciated.. thanks.  👍

Got sorted, it was a gas refill that was required...All working fine now...👌

[NJRJ]

25 minutes ago, SkodaNP said:

Got sorted, it was a gas refill that was required...All working fine now...👌

Refill implies you had a leak, unless you didn't use it much at all (in which case the seals dry out and leak). Hope they checked for a leak, I got caught out years ago by by Kwik-Fit for this, I assumed they checked for leaks! Once leak re-appeared then KF said they could fix the problem, and re-gassed free, but they wanted stupid money for anything more than a re-gas.

I found a specialist and they pressurised system with UV dye to find leak, fixed it (new rad) then refilled it - cost less than KF, shame I didn't go there first 😟

[J.R.]

How many more decades will the old chestnut of seals drying out and leaking of aircon not used continue to be trotted out?

 

It was questionable even back then but since the days of clutchless constant drive compressors its just plain & simple false news.

 

R134a gas will permeate any of the seals and flexible hoses slowly unless we wanted to add a couple of zeros to the cost of our vehicles, lots of figures are quoted but I reckon 15% per year is a reasonable assumption, this does not mean that there will only be 10% left after 6 years, its a 15% diminuation of the remaining charge and as the charge & pressure drops so will the leakage rate.

[facet edge]

The EU made this problem even worse by specifying a gas which leaks much more readily than the previous mixture did.

This was done in the name of saving the planet but it certainly made one manufacturer very rich.