Hello,

 

I have a strange problem. My car do not heat interior (all fans work, engine is not overheating) ,some time heating kicks in , but for short time like 20 min and that heating I mean 10-15 deg top, and later it blows only cold air from outside. 

 

Also when I shut down car some times main radiator ventilator is spinning rapidly for 5 min and then shuts down.

 

In few hours planning to do diagnostic and will learn more about faulty codes.

 

Any ideas?

Welcome.

 

Sorry no idea on your heating. Hopefully someone with the knowledge / experience will ne along. 

 

 

As to the radiator fan, that is likely your TDI doing a regen. 

you get electric heater heat until the engine starts heating up, and then the electric heating shuts down. are you actually not overheating? try going onto the motorway.

 

also, when your fan is spinning, is your radiator hose cold?

No engine is not overheating, its stable on 90 deg as dashboard says. I did scan and got this error.

 

Actually did not checked hose.

Do you use the aircon also whilst the heater is on?