I have got a Bosch Intelligent frost free 44 fridge/refrigerator. The refrigerator is working well, but the fridge compartment is warm. We defrosted the appliance and then it cools down for a day or two and start to warm up again. Please help!!

Melt, August 2022

Possible problem with auto defrost not defrosting.
There may be a heater somewhere in the cooling system that melts frost off the cooler every so often
There may also be some kind of motorised flap somewhere.

This may be useful:

https://www.fixya.com/support/t26495985-bosch_intelligent_frost_free_44_ice_up

Ddjddu, August 2022