Product review (3 stars): Does not work correctly out of box
Out of the box, this unit will not function correctly.  You will have serious problems with foaming beer because of 3 defects.

1. Temperature regulator does not sense liquid temperature.  It is also located too close to the cooling plate and needs to be moved further away to get a more accurate reading.

2. The tower does not flow cool air and ambient temperature inside is much higher than it needs to be

3. The spigot is also non-conventional and doesnt encourage an even flow

As far as I know, mine doesnt make any noises at all so I'm not sure what the other review is referring to or if they have a unit that isn't working correctly.

All of the above problems can be corrected.

Temperature -

a) Purchase a new regulator and bypass danby's.

b) Move the sensor away from its current position and put it in water to get a more accurate "liquid" reading.

Tower - Install a small fan to circulate air into the tower

Spigot - Replace with a standard one

Unfortunately for Amazon reviews, i cant link to other information that will help you do all of this, but if you search for the name of the unit, links that will help, show up very high in the list.