Good, I am with the same problem as you. I appear the 4F9.00 failure, search the Internet and put me that it was the blower. Remove the glove compartment and before disassembling the blower, check the current and did not reach it. (Luckily does not remove the blower because it costs a little work), check that it works because it puts a current with a battery starter .
I followed the cable until, I think it is, a resistance. And an amibo I check the contestor, that several cables arrive, according to doughs (which I think are the speeds) if it came current but the positive and negative no, and I am sure to surely have to be evil for all this to all this, I had already proven the fuses).
So I take the opportunity to see if someone tells me where the blower or fan of the A/A in the Ibiza is going.