No heat from blowers

[Rob904522.5]

Hi guys.

I have no heat from the blowers, all I'm getting is cold air. Scirocco mk3 2.0 Tsi

I scanned with vcds and I got a 9481988 code - Air quality sensor - B10AF 04 Internal system fault

Would this cause the issue?

I only got the car in July so I actually haven't used the heaters at all

I haven't checked for certain but I believe the radiator fans constantly run and sometimes the temperature needle has been dropping by a quarter then returns to normal I first noticed this when going down a very steep hill, the car is currently stage 3 so I'm wondering if its been setup to always run.