Scenic heating

Hello very good to all those in the forum, I am not new for Aki but if I carry much without entering, to the point of having to open a new account and all jiji,
well my consultation is the following, because I do not find anything for any place or in this forum or in anyone, I have already looked at everywhere and on my car model or do not break anyone or that only mine exists, to see if someone can throw me a cable.
It turns out that a while ago I try to turn on the heating of the car and it does not even make a mu, well when he wants, it is something that has a flies I have disassembled the dashboard a few times to see what happened to him, I looked at the preheater that is inside the heating radiator thinking that it was there the problem, I have seen that some changed a condenser of 216 degrees centigrados or so That, check if the device came to the device but it did not arrive, I went to look at the change that is under the dashboard, next to the fan and it did not work or almost, because they are already going around, I left it for the next day and which is my surprise that after hearing a sizzling began to function perfectly for two days without problem, because I stop working, I have reviewed all the fuses of the painting and none fails the air conditioning is more connected and I give the wheel to work on the fan and the air apparatus works but the fan does not move, my car is a Renault Megane Scenic Alice from 98 90 horses.
Let's see if someone can give me any idea why this so weird and forgive for the Royo that I have released.

The Renault usually have problems in the fork speed variator, I would look for the problem, I hope it serves you.
A hug