Why is my refrigeror freezer making a chirping sound?

Turn off by pulling the mains plug. Leave for 5 minutes and plug it back it. If it is a software based sounder, this might reset the mainboard.

Or, it may be a mechanical noise like a fan resonating.

Some help here

https://www.google.com/search?q=miele+refrigerator+%2F+freezer+combo+making+constant+chirping+noises

..

I think you should try the following:

1. turn off the power.
2. clean/vacuum the lint under and behind the fridge.
3. after a few hours, power on.
If this does not work, you will have to call a repairer unless it is under warranty.
good luck

Noise inside the Freezer
If your freezer is making a squealing or a little chirping sound, your condenser or evaporator fan is the cause. Open up the freezer door, and the noise usually gets louder. The location of the fan depends on your model freezer. Usually, the fan is located on the rear wall of the freezer. The fan can lose lubrication or become rusty over time. You cannot repair the fan. You must purchase a new one.
Have a nice day : )

hello,
Is the chirping sound coming from freezer fan,the fan by the compressor,or is it from the compressor itself.
If it is from one of the two fan motors and not the compressor the bearing on the fan motor is noisy and that fan motor needs to be replaced
if it's from the actual compressor the compressor would need to replaced and that would be very costly while either of the two fans isnt to expensive
reply with which fan is noisy and i will tell you how to replace that by yourself

Good day,
Sounds like the cooling fan motor behind the rear panel is failing (bearings going bad). Remove the panel to verify. If so, you will have to replace the motor. Oiling will not work. May help for a short period of time but will go back to the same problem shortly.

Please go through the It's Noisy part on the below link: http://www.repairclinic.com/Refrigerator-Troubleshooting

Sounds like the plastics are just rubbing from vibration. redistribute the contents of the drawer and see what that does. Good Luck.

You need to replace the fan motor , pt. # WR60X190 . Remove the food and the ice maker ( if equipped ) , and remove the grill at the top left on the freezer panel ( pops out ) . Remove the 2 screws holding the rear freezer panel on , and remove the panel . You may have to remove the white housing to replace the motor , or just remove the fan mounting bracket screws , to remove the fan for replacement .

Motherboard

Simple fix. Unplug refrigerator, locate fan, wipe clean from collected dirt etc. and spray a little WD-40 on the shaft. Spin the fan. Plug in and voila, chirp is gone.

Permanent fix, replace motor.