I haven't noticed the radiator fans cutting in yet. On my previous car (an MG ZT), they came on after 60 seconds or so when idling, and were pretty loud. Are the Leon fans obvious when they are on? If mine are not cutting in, what might this mean, for the air con and for anything else?
They are not very loud, but you should be able to hear them or see them turning when you open the bonnet.
Could be several reasons.
Lack of pressure in the system is prob the favourite. If the pressure is low then the compressor will not kick in
Can you hear the compressor clutch kicking in and out? A loud click
Get someone to start the car and turn on the air-con while you listen under the bonnet for the clutch
The machine I have at work will not let you fill the car with refrigerant if there is a leak. It pulls a vacuum and tests for leaks after removing the old refrigerant. Ask if theirs is the same. Fully auto machines are far superior to old manual ones
Another tip for cars that are difficult to get the air con working well in, is to re-gas while the engine is running with the air con turned on and the interior fan on full. This helps to get out as much as poss before the machine fills the car again with fresh refrigerant
Hope this helps