Bit of a strange one - the aircon will blow cold air fine however for no reason it will suddenly blow hot air with no rhyme nor reason. Also the recurculation switch will only stay lit for a few moments and then will go out. Any ideas people?

Sounds like there is a problem with the temperature and recirculation flap motors. You need to get it scanned for faults and see if they can reset.

You've posted this in the Fabia section , but your profile says you have an Octavia VRS....

I had something similar on my Mk2 Octavia and Skoda could never find out what was wrong - in fact the one dealer basically told me I was making it up