freezer keeps iceing up on coils looks like the defrosting thing at the bottom is burnt and needs replacing it froze up today and i defrosted it again then when i pluged it back in it took about 15 minutes before the fans and compresser would kick back on now its working again its been 5 days since if had to defrost but last time it came right back on this time it took 15 minutes could the defrost timer have something to do with that happening??should i try to just replace the defrosting thing that looks burnt first and see what happens???and where is the defrost timer on this model???i really need help i cant afford a service tech or a new fridge just had a baby and its tight round here is there anyway to manually check the defrost timer???please help you can even call me ralph carter 850-584-2024 id appreciate any help at all thanks