Bosch classixx frost free fridge freezer

its either the defrost heater or defrost thermostat or the defrost timer has gone bad and the evaporator is iced over,HINT: (you will see the inside rear panel in the freezer has frost on it) and the evaporator fan cannot blow cold air over the iced up coils in which case soon the freezer will start to seem warm too,if this isnt the case then its the damper vent door located between the freezer and fridge compartment that opens and closes to throttle cold air into the fridge from the freezer,sometimes they freeze shut from condensation or the door hinge breaks and it can jam shut,also if theres excessive water dripping into the fridge from the top it can be a plugged drain hole and water blocks cold air flow,also make sure the evaporator fan beneath the evaporator coil in the freezer is operating when the units running or cold air wont be pushed into the fridge either

That is caused by defrosting failure. There is a small heater tube at the bottom of the evaporator behind that panel which goes bad and is easy to replace. But it all has to be defrosted using a hairdryer first. Heater can be bought online or purchased locally.

If you need further help, reach me via phone at https://www.6ya.com/expert/gary_9c859f4aa7e5ab10

the evaporator coil inside the freezer compartment is iced over and can't transfer cold air in thes condition,remove panel inside freezer on back side of freezer compartment and thaw it out with a hair dryer,then check the defrost heating element for continuity,if its open replace it,if its good, ,check the defrost control that powers the defrost heater

The door seals may be leaking but also make sure the drain is open.

We have the same and I think it is because the freezer door bounces open when we shut the fridge door. Then the freezer compartment ices up, the fan clogs up with ice and cannot blow cold air into the fridge, and the fridge gets warm and the milk goes off.
Solution? We have bought one of those child safety clips (search for fridge safety clip or lock) to hold the freezer door closed.
Simple design error. Expected better from Bosch :-(

It's stopped completely 
It's not cool
Cooling is poor
It's noisy 
It leaks
The freezer compartment is icing up
The food in the refrigerator freezes
There's water dripping inside the refrigerator
The refrigerator never cycles off
The ice maker has a problem
There's an ice- or water-dispensing problem

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If all else fails I would completely defrosted the unit.If there is any blockage this will open up all the tubes.Unplug it open the doors put pans of hot water in the freezer to speed up the process.
Make sure your fan is still working ,its located behind the freezers back wall. If it is working the vent from the freezer down to the refridgerater may be blocked.With out a fan you have no circulation but your freezer may look likes its working,it may last 3 days.Also if you can move everything out unplug it turn it off w/ doors open 12 to 24 hrs this will free up any clogged tubes. Good luck.
Len West

Sounds like a defrost problem. Check to see if there is any frost buildup in the back wall of the freezer. If so, it is not defrosting as it should.

• possible causes:

1. bad defrost timer/board
2. bad defrost heater (in freezer)
3. bad thermo switch in freezer

If you don’t know what these are then unplug the machine and let the ice melt in the freezer overnight with the door open. Then try it the next day, if is cooling fine then you need to have a service person replace one of the above items. If it still has a problem then it might be the compressor and you should probably replace the machine.

Hi - experienced this myself and spent ages trying to get to the bottom of it - only found one post but it worked and was absolutely clear on the cause nb: i'm not an "expert" !

My understanding of how the Bosch f/f works is that the freezer compartment generates the cold air for the fridge which is regulared at the fridge end . At the back of my fridge there are two "vents" which feed up this cold air up from the freezer into the fridge.

Problem happened to me because I left the freezer door slightly ajar which generated a massive amount of frost (sucking in the moist air from the house I guess then freezing it) and subsequent ice froze up the cooling ducts between the freezer and the fridge. Therefore, no matter how much I turned up the fridge thermo it never got cool. Only solution was to dump my frozen at a mates house and defrost the the FREEZER for a good 24 hrs +.

Worked tho' - fridge was completely back to normal.

PS: I understand this issue may also happen if you put too much unfrozen food into the freezer at one go and in working overtime to get it frozen causing a massive frost up again.

the evaporator is probably iced up and hence poor air flow. (i am assuming it is a frost-free type). switch off and leave for 24 hours with door open is the easy cure. otherwise, remove the back inside panel of the freezer and melt off the excess ice with a hairdryer used carefully