Hopefully someone can help because this problem is ridiculous now

So the air con, which has been re-gassed, had a full electrical cable and connector trace, and any chaffed wires or dodgy connectors repaired.

now the problem, when the mood takes it the air con will be fine, sometimes for days but then it just won't work. so you drive off, windows down, and get on with it but after a bit of right foot ( mine is like lead anyway) all of a sudden the air con fires into life. the thing is, i cannot replicate what makes it fire back up and it will usually be fine for most of the day once it has done this.

can anyone help :S