New to the site, Have an approximate 8 year old GE Proflie Performance fridge side by side, freezer compartment gets iced up- bad and the compressor keeps running and fridge wont get below 60. while freezer stays around 50
I read several replies on icing refridgerators about checking and replacing the defrost timer, the defrost heater, defrost thermostat and possibly the control board.

For this model TFS22PPDABS GE Profile Performance the defrost timer appears to eb the same as the fridge control knob, I see no way to turn the shaft with a flat bladed screwdriver and checking 10 mins later for a sizzle. I also cannto find the control board or the heating unit, it must be behind the ice maker unit.
I called a technician in who wanted over 400$ to replace the defrosting system but he recommended a new fridge since the compressor may go next due to the extra stress. I see all these parts for the defrost system sells for about 50$.
Should I just replace this unit (as one piece) and see what happens ? I am handy with a screwdriver but the diagram/instructions seem sketchy considering it does not dismantle easy. Any help or advice is appreciated.
Thanks

Thanks, found the defrost timer , turned it till it clicked and plugged the fridge back in, the unit worked as normal but I never heard a sizzling sound, so I guess the defrost timer is good. Now, in a few days or a week it will ice back up again and the temp will go down, I assume the next bet is to test the defrost heater and thermostat, I took the back panel off in the freezer but dont see the picture I expected, is this behind the ice maker unit below the freezer fan or can it be removed form the bottom without taking out the plate where the freezer light bulb socket goes thru.
Thanks again

Thanks, found defrost heater and removed, checked continuty which showed it was bad but also removed from shield and the coil inside was all burned out so I ordered a new heater defrost assembly from the website. Thanks I hope to install this and let you know the results. I plan on just installing the heater unit and using the old leads and defrost thermostat since the heater coil itself was so bad. Do you recommend this as a wise course, I did purhcase the whole set but it seems so obvious this was the issue.
Thanks again

Wonderful, I installed the unit, defrost heater assembly and after a month the refridgerator is still working fine.
Thanks so much for all your assistance, great site, great advice and saved several hundred dollars from the quoted repair price !!