To my understanding, there is never a vent for the interior of a refrigerator. It tends to let 'the cold' out...
Intermittent operation of speakers means a poor connection somewhere. Find it yourself or give it to the dealer's service department for 3 weeks so they can't find it either.
TT 2015 19RD "TheJayco"
TV 2003 F-350 "Montblanc" - Housebroken chore truck
Sitting in The Cheap Seats.
And proud of it!