Model Number: PF6SSPKW
Brand: Brand
Age: 6-10 years

Alarm keeps going off, light in ice/Water dispenser turns on and off, get ice in refrigerator under deli tray. Downloaded service manual and was able to run self diagnostics. Gives an error code for freezer defrost heater.

Manual has what all to test, wondering if I should go through all of that or is this semi common and there's something else I should do or something I should replace right away.