Dismantled this fan / ventilator just to find out that a 50 cent electronics part had failed. This attempt at DIY ended pitifully unsuccessful.
<a href="//commons.wikimedia.org/wiki/User:Franz_van_Duns" title="User:Franz van Duns">Franz van Duns</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>