The person hiding in the footwell methinks.. 😁 just couldn't resist..

 

At a guess, one or some of the wires have overheated and or corroded and are barely making sufficient contact.
Open it up for a looksee.

 

They are well known for sticking and a pain to remove the fan.. check your aircon filter.. bet its solid with dirt which contributes to fan sticking

Check you tube..

 

This might help - it's a lefthand drive tho -

YouTube - Clio 3 heater fan blower fix

 

mine is right hand drive alot harder to do I think, was hoping for a quick fix lol

 

Nope exactly the same only on rh drive you need to remove steering collom and probably a pedal or two thanks renult

 

Sorry to hear that. I wouldn't go into that much work unless I absolutely needed to. That means dropping the rear subframe and most likely - the exhaust flexi, just so you can drop the subframe.

If you do decided to do the job. I'd look into changing the bushes on the anti roll bar if they've started to perish. May as well, why you've got the subframe dropped.