My 2017 TDi heater is suddenly blowing cold even at normal engine temperature. Oddly the passenger vents are delivering slightly warm air (nowhere near hot) while driver's side are stone cold. Advice gratefully received. Thanks

Mine 2016 TDI L&K is exactly the same, I have been told its the heater matrix, anybody idea of costs?

I saw £193 for the matrix alone mentioned on Facebook

What colour is your coolant? Has it gone a bit muddy? There is a well documented issue where the silica bag in the header tank bursts and it's contents pollute the cooling system blocking any fine tubes etc especially the heater matrix. Look for "mit silikat" printed on the header tank. Smaller petrol engines do not have this.

 

[EDIT] Found the Briskoda link:-

 

Edited 19 November, 20223 yr by bigjohn

Coolant is correct pink colour and car has full main dealer service history so doubt it is that

There are quite a few threads on this subject. 

5 hours ago, ords said:

There are quite a few threads on this subject. 

Thanks very much 

SOLVED ! THANKS TO A YOU TUBE VIDEO, I RECALIBRATED THE AIR VENTS AND HEATER WORKS PROPERLY 😁

 

On 19/11/2022 at 17:59, Manchester78 said:

Mine 2016 TDI L&K is exactly the same, I have been told its the heater matrix, anybody idea of costs?

Yes very cheap after market 35 all in 

On 19/11/2022 at 17:59, Manchester78 said:

Mine 2016 TDI L&K is exactly the same, I have been told its the heater matrix, anybody idea of costs?

Fabia 1.6tdi only 35 quid all in 

On 19/11/2022 at 17:59, Manchester78 said:

Mine 2016 TDI L&K is exactly the same, I have been told its the heater matrix, anybody idea of costs?

I have a new one for sale 60 quid

So how do you recalibrate  it if its the manual  type