Changed filter on samsung rf4287hars refrigerator. filter icon on LED is still red

It indicates a fault of the defrost sensor. This element acts as a switch between the timer and the heater.

https://www.manualslib.com/products/Samsung-Rf4287hars-Xaa-4951998.html

Hi! Please check the Troubleshooting part of the manual to this Samsung fridge. Hope it will help! https://manualsbrain.com/en/manuals/1290202/?page=39

Clog, filter perhaps?

If you need further help, I’m available over the phone at https://www.6ya.com/expert/ron_a476a70a75690d24

you will need to take the who dispensing assembly out of the door and disassemble it
Parts for Samsung RF4287HARS XAA 0001 Refrigerator Door Parts

Press "Alarm" and hold for 3 seconds. It will reset the Filter Reset.

Good luck

5e indicates a failed fresh food defrost sensor. It should be repaired by a qualified Samsung technician. It is an inexpensive repair, but further damage could be caused while accessing the sensor. Make sure the tech installs the new sensor on the evaporator outlet, and not back on the inlet.

Where do I insert new filter

Press and hold "Alarm" touch pad for 3 seconds and it should reset the filter light to blue.