Renault Grand Scenic BJ2004 JM interior fan does not run

Hello, with my Renault Grand Scenic 1.6 BJ2004 type JM the interior fan is no longer running. If I set different fan levels on the control panel of the air conditioning system, the display changes, but at no level is anything to be heard and no air draught to feel. The workshop says that the fan engine and the control system are broken. Repair approx. 700€! It costs so much because the complete dashboard has to be removed. Now I want to repair this myself. I w I’m not a passionate car screwdriver. Do you really need to extend the dashboard for changing the fan motor and possibly renew the PWM control?? If I understand that correctly, the fan motor sits near the glove compartment. Can you get over it? If not, is the dashboard’s removal difficult? Does one need special tools for? Does jeman ever know how to use it? d on the Internet a guide with pictures of how to do that? I am grateful for hints of all kinds.