No air from vents

[Seat0510]

Hi.
I have a strange problem on my seat leon fr 2016 1.4 act tsi (great car by the way 210000 km with no serious problems except this one)
I aplogize for my bad english.
So the thing is.. In spring/summer when temperatures are a bit higher I have a problem that my air is not comig through the vents.

When I drive for a while, there is constant decrease in air Flow from vents, from Max to zero.. So then I click ac/Max and all you can hear is blower motor is spining on Max in glove box, But no air is comig through vents, it is quite frustrting because it gets very Hot in car.
So the only thing that helped so far is that I stop some where turn off car and wait for 5-10 minutes and it works normally for some time.
I went to my mechanic he pluged it on computer But there is no error, it looks like there is some flap is closed. He changed one of the termostat But it didnt help. The next thing I will try is when the Flow will be decreasing I will turn of the ac and will se if this will help.

I was searching for same problems on Google and this forum But I didnt find anything

Did anyone had similar problem?

 

[RUM4MO]

In a perfect world, you would buy a VW Group compliant scan tool, and use it to find out what is happening. Personally I own and use VCDS, using that should allow you to log what the many motorised flap valves are doing - and more.

Edit:- all these "flap motors" have positional feedback so you can log that.

Do you have auto HVAC or manual HVAC (heating cooling and air con).

Nothing wrong with your english.

 

[Walone]

You may need to 'reset' the heater flaps, the is a procedure for doing it by pressing certain buttons, but I'm not sure how.

 

[RUM4MO]

Yes, but only if it has auto HVAC.

 

[Walone]

Yes, but only if it has auto HVAC.

Yes, I did make that assumption.