Re: Bosch KGU3201BG Fridge Freezer – Freezer Temp Fluctuate
Are the products in the freezer solid?
If so it may just be that the NTC sensor is going out of tolerance giving you a false reading.
You could also try a 48 hour period with the appliance switched off, just to start the frost free off on an even keel. Frost free’s do occasionally get the defrost wrong and eventually get to a point of no return and need a manual defrost (switched off).
Greg