I have a Bosch ksu 44 fridge/freezer which turns on and off with a click, click sound. But when you open any door the it starts to work again as normal. What could the problem be?

Usually there is a fan with a thermostat that transfers cold air from the freezer to the frig. Sounds like it is in that area. Maybe the melted water got into the fan and froze it up. I'd try unplugging it and drying it all out for a couple of days with the doors open. Maybe clean out the tray on the bottom and vacuum out under there and also any access you can get to the back.

the fridge might have iced up in the coil due to a defrost problem. one way to check it is to leave the fridge off for a few hours and leave the door open. turn the fridge back on after the few hours and see if the performance is any better. Let me know how it goes

ice in the freezer is normally from the door being opened continuously and moist air being drawn in each time
or the door needs adjusting so that the seal is in contact all the way around it
freezer settings work opposite to fridge setting so 1 is minus 0-5 degrees, 2 is minus 5-10 and so on
try a default setting of 2 or three to start with
freezers are meant to store item until ready for use and are not meant to be opened all the time like a fridge door so it may require a change of habit in the freezer use.
another point
upright freezers are very bad in operation when compared to chest freezers because every time the door is opened , all of the cold air falls out onto the floor ( you can see it as a fog on some days )and that sucks in warm moist air into the unit which is where the ice is coming from

check door gaskets are in good condition Open and close door quickly Wait for maybe 10seconds and try and open the door . If the gaskets are working there will ne a marked resistance to opening

Very common problem on that fridge and a easy fix: Replace the two big capacitors on the right side of the control PCB 1uF = 0,68uF 250V They lost their capacity causing bad uC supply and this strange LED blinking. Be aware that this blinking can be intermittent and the fridge appears to return to operation. But the uC suffer a lot of internal resets causing intermittent operation stops, low temperature and more not easy recognizable or strange mal functions. So, if You face that blinking normally the capacitors are gone. Some strange and intermittent behaviors of the fridge are also back routed to this PCB - Capacitor malfunction. So enjoy this 30min fix. The capacitors should not exceed US$2 in Your local electronic shop. If You don't want to spend the US$2 You can find the capacitors as a lucky guy in a old PC power supply.
For other more complex problems be aware that the controller board has a very nice and helpful self test option. You go in this mode holding the temperature select button of the refrigerator (not the freezer button) then switch the fridge on and stay on holding the temp button for more 10s. The self test sequence starts in the moment when You release the temp button.
LED 1: Checking sensors (Blinking=OK - Continues=NOK, something wrong)
LED 2: The Flap opens and close two times (Alarm LED shows the open and close position, so the led must go ON and OFF two times in accordance of the detected flap position from the internal reed contact. (So, no action on the Alarm LED no movement on the Flap or a defect Reed contact)
LED 3: Fan goes ON and OFF
LED 4: Drain Heater goes ON and OFF
LED 5: De- Dicer Heater goes ON and OFF
LED 6: Compressor goes ON and OFF
LED 7: End of test sequence - Initializing procedure of normal operation.
Every step takes 30s and the whole sequence take tree and a half minute. Be aware that the alarm LED is no malfunction indicator. It has only the indicator function for the sensors.
The fridge goes in the normal operation mode when he passed the sequence. No further actions necessary.
Be aware that every time when the fridge faced a total power lost he makes a short silent 30s check sequence. If he face a malfunction (Sensors or actuators) he doesn't start the compressor anyway to protect the fridge for further damage!!! So, this test sequence is a nice tool to check that the fridge is in the right conditions to start the working and even so to check the compressor function before maybe a unnecessary replacement .
With a second build in test option you can select and activate devices in the fridge. For this You hold the fast freeze button and switch the fridge on. After 10s release the button and you are in a manual test mode. With the temperature button select the component - Push the Fast freeze button to activate or deactivate. For example: Select LED6 (Compressor) with the temperature button, push the fast freeze button for ON and OFF. But I ask You to be careful on this test mode to avoid further damages. For example a blocked motor that You should release better by hand than blow up by a tricky fingertip. Enjoy this fix and feel free for Crtl C + Crtl V.

I think it's the freezer fan that stopped working,open the freezer and see if it goes you should hear it running and even see.This fan allows the cold air into the fridge compartment,without it it takes ages for the fridge to get cold.I've got the same problem if you find the motor online let me know on [email protected]

try this first :
turn your thermostat down first until the fridge stops .
turn the thermostat back up only a quater of the way and wait to see if the fridge turns on and off as usual .
if it does , the thermostat is ok .
if it does not , i believe the thermostat is dead .
in regards to the ice in the fridge part , you maybe have the fridge turned to far up but let me know how you go .

Check the hose or the drain hole in the back of the freezer make sure hose is connect and the drain hole is not plugged

Hello mathsmike,
Welcome to fixya,


You said,We have a relatively new Bosch fridge-freezer. It has started chuntering away like a motor-bike in the corner of the room. It falls silent if either door is opened. Sometimes it falls quiet and runs sweetly for hours before starting this racket again. Any ideas?

What is the Complete model number and the date you bought the fridge!

It sounds like it may be a faulty fan or fan clutch from here, if it's not something else very simple!

Send me the info requested and do a repair search for you !
Waiting for your response!
Huuum



Here are some common noise problems till I look your unit up!

1.Check that the fridge is level, using a spirit level!
2. Appliance is touching some other unit or appliances, or counter or wall.
3. Drawers, baskets,or storage ares are loose, or sticking!
4.Receptacles or bottles are touching. Move them away from each other,
ESPECIALLY ON THE DOOR,because it's quiet when the doors are open!

hi. thanks for the question. leaving the door open ,would let a lot of moisture to enter the freezer, and cause it to frost up. to clear frost. cut power to fridge, open the doors .,let thaw over nite clean up the water mess. dry the inside of fridge & freezer turn power on good to go. to stop the door from being left open .lift the legs under the front so the fridge has more weight, and it will close by self . no more doors left open. thanks the appliance doc