[Bowlie18]

Bought our 2018 A180d three weeks ago and we have had this issue intermittently. Today it was 21 degrees outside and for a half hour drive the car just pumped in warm/hot air unless climate control was set to LOW. Tried car short time after getting home and air con cooling came on immediately! Will go back to dealer hopefully to sort but as it is intermittent my hopes are not high! From reading other posts looks like could be control unit?

 

[veeeight]

The most common cause of warm air being blown into the cabin, is a faulty temp sensor located in the overhead console where your SOS button is.

The solution is to replace the entire console, but the latest consoles do not have the sunglasses holder installed.

 

[Bowlie18]

Thanks for the feedback, I will use it when I go back to the dealer. If they can fix the climate control I can live without the sunglasses holder!

 

[Silvermachine]

I have just bought a used A200 but not from a Mercedes dealer which has this problem. I didn’t notice anything until I adjusted the temperature and it went crazy pumping out hot air even down to 17deg only stopped it by going to low. Had to drive home with it off. I’m going to register at a local Mercedes dealer hope they can help. Amazed previous owner hadn’t got it fixed, it’s still under warranty. I hope….

 

[Bowlie18]

Mine has gone back to dealer today to gave this fixed. They said it was a recognised fault and would probably replace the control unit. Fingers crossed.
.

 

[Silvermachine]

Mine has gone back to dealer today to gave this fixed. They said it was a recognised fault and would probably replace the control unit. Fingers crossed.
.

Mine is booked in for the 30th

 

[Bowlie18]

Mine is booked in for the 30th

Good luck!

 

[Bowlie18]

Well the control unit has been replaced - eventually! Seems to be working OK now but time will tell.

 

[Basss]

I've mailed the official MB a month ago, no reply yet if this is a known issue. I'm also not spending 500 euro for this fix while everybody has this problem. Opening a window works as well...

 

[Silvermachine]

I've mailed the official MB a month ago, no reply yet if this is a known issue. I'm also not spending 500 euro for this fix while everybody has this problem. Opening a window works as well...

Mine is a late 2018 A200 it’s in Mercedes World as we speak, has this problem, they are replacing a faulty sensor in the overhead console which is faulty and a known problem. I am picking it up this evening let you know if it fixes it.

 

[Bowlie18]

Mine is a late 2018 A200 it’s in Mercedes World as we speak, has this problem, they are replacing a faulty sensor in the overhead console which is faulty and a known problem. I am picking it up this evening let you know if it fixes it.

Mine has been OK since they changed the control unit so hopefully it will work for you too.

 

[Silvermachine]

Mine has been OK since they changed the control unit so hopefully it will work for you too.

Thanks didn’t get it yesterday waiting for parts….. (what else was it going to be….) picking it up later today…hopefully

 

[Basss]

Mine is out of warranty (2 years, 10 months). Is there any official statement from Mercedes where I can refer too toward my local MB dealer?

 

[Silvermachine]

Received the car back today from Mercedes Brooklands. They replaced the overhead module, with a different unit. It doesn't have the sunglasses holder. Why previous owner didn't get it changed I don't know. They also flashed engine and gearbox modules with the latest update as I wasn't happy with the gear change points in comfort mode. It's all fine now and no charge as still under three years old.

 

[Silvermachine]

Mine is out of warranty (2 years, 10 months). Is there any official statement from Mercedes where I can refer too toward my local MB dealer?

It's still under warranty up to three years

 

[dilligaf709]

Bought our 2018 A180d three weeks ago and we have had this issue intermittently. Today it was 21 degrees outside and for a half hour drive the car just pumped in warm/hot air unless climate control was set to LOW. Tried car short time after getting home and air con cooling came on immediately! Will go back to dealer hopefully to sort but as it is intermittent my hopes are not high! From reading other posts looks like could be control unit?

I had exactly the same problem and fixed mine by cleaning the sensor fan located within the control unit. Simple and you keep your sunglasses holder.

 

[Silvermachine]

has anyone solved the problem of air conditioning?


thanks

Yes the overhead module is faulty needs replacing.

 

[greatbrit]

But if they replace the sensor, if you have the sunglasses holder, you may lose it. I'd be curious to know if they can replace the sensor but keep the holder.

 

[Silvermachine]

But if they replace the sensor, if you have the sunglasses holder, you may lose it. I'd be curious to know if they can replace the sensor but keep the holder.

No the new module you loos the sunglasses holder as it is bigger

 

[dilligaf709]

But if they replace the sensor, if you have the sunglasses holder, you may lose it. I'd be curious to know if they can replace the sensor but keep the holder.

Have you tried cleaning the sensor fan from dust in the in the control unit? See instructions here:

How to fix the Climate Control Blowing Hot Constantly

My A200, W177 2018 had an intermittent problem of the climate control blowing fully hot no matter what temperature or mode was selected. Only selecting LOW would make the car blow fully cold. I had seen on this forum that many other a-class owners had the same problem. I reported the problem to...

www.aclassclub.co.uk