The freezer temperature control lights do not work and the freezer is freezing up. This stops cold air being blown in to the fridge. If i defrost the freezer it will work ok for a few weeks then i have to do the same thing again
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Re: Bosch Classixx Frost Free KGU34640GB/06
You have found where the problem is and now you must find what the problem is. The freezer is not defrosting tells you the problem is there. Defrost of the freezer coil is started by a timer, the time energizes the heaters, when termination temperature is reached the defrost thermostat opens, the timer continues until the time expires (18-22 minutes). First locate the timer, rotate the clutch head screw SLOWLY clockwise until on e click is heard. The heaters should come on a defrost take place. If timer restarts the system after the time period check the heaters for continuity. If no reading on an Ohm meter replace the heaters. If you find the heater O.K. by a continuity reading, check the defrost thermostat.
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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 :-(
How to check
If the evaporator coils behind the back panel of the freezer
are icing up because of auto defrost failure that will stop the circulation of
cold air and eventually affect the freezer too.
check defrost timer, defrost heater, defrost thermostat. In
most newer models the timer has been replaced by an electronic control board.
If the heater and thermostat are ok it’ll be the control.
You can turn the defrost timer till it clicks
and everything shuts down. The heater should now come on. If it does, replace
the timer. If it doesn't, check the heater and defrost thermostat. Turn the
timer again till everything starts back up to end the defrost cycle.
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.
bad defrost timer/board
bad defrost heater (in freezer)
bad thermo switch in freezer
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