Went to the stealer last night to sort this out. They agreed it is a
problem and my car is booked in on Monday. Luckily my car is under warranty so it's all covered.
They took some convincing there was a
problem though and had to ring SEAT in the end as the fault was not recorded with them. One low speed fan is supposed to fire up with the aircon on, it seems my low speeds have failed meaning both high speed a running to try and keep up.
Anyway, I'll let you know what they do to fix it.