Miele KFN 9753 ID Normal noises, What causes them?, Noises that you can, easily rectify

Noises

Normal noises	What causes them?
Brrrrr...	Humming noise made by the motor (compressor). This noise
	may get louder for brief periods, whenever the motor kicks in.
Blubb, blubb....	A gurgling noise can be heard when coolant is circulating
	through the pipes.
Click....	Clicking sounds occur whenever the thermostat switches the
	motor on or off.
Sssrrrrr....	In multi-zone and frost-free appliances, the movement of air
	circulating through the appliance can sometimes just barely be
	heard.

Please bear in mind that a certain amount of noise is unavoidable (from the compressor, and the coolant circulating through the system).

Noises that you can	What causes them, and what can you do about
easily rectify	them?
Rattling, vibrating	The appliance is uneven: Balance the appliance using a level,
	and by raising or lowering the screw feet underneath the
	appliance, or placing something underneath them.
	The appliance is touching another appliance or piece of
	furniture: Move it away.
	Drawers, baskets, or shelves are unstable or sticking:Check all
	removable items and refit them correctly.
	Bottles or containers are unstable or knocking against each
	other: Separate them.
	The transport cable clips are hanging loose at the back of the
	appliance: Remove the clips.

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