HEATING FAN/A.AC.

Hello everyone;
I have a Ford Escort 1.8 TD.
As every year and agreeing with the holidays you have some problem. This year he has touched the heating/air conditioning fan. The problem is that the 1st and 2nd speed did not work but the 3rd.
Did you solve it? : Change the resistances above the fan.
How to get to the fan: it is between the firewall and the clean. "It is not necessary to disassemble the firewall", you can take out the resistances without disassembling it.
How to do it ?: It is a bit hidden but just behind the cables that pass over the firewall there is a small housing that is entering. When it is removed, the connections of the resistance 3 input cables and one of the output appear.
Well, when the piece is taken, the resistances that are two pure and hard docks are.
If someone is helpful, I am satisfied: it is a whore to run out of air in summer !!