I have a 2012 Octavia VRS Blackline and aircon has stopped working. Went for a regas and garage told me that the Air Quality sensor was not working when he plugged in diagnostics. He said there was no leaks but this could be the problem as it would stop aircon from working and operating compressor?. Went online to find out where it is and all the info i could find tells me that it is under the grill passenger side scuttle panel in front of windscreen. Took this up and had a look for it but cannot find it, so any idea where it is please. Any help would be appreciated. Forgot to say that when i turn aircon on the light on switch does not come on but the info screen tells me it is on.