GE Profile Arctica PSS27SGPA. The freezer temp is fluctuating between -6 to 15. The ice is melting and then re freezing. The express thaw light is on at 3.0 lbs but no fan is blowing. When you push the thaw botten it cycles through the lbs with the fan on an the turns off after 3.0 lbs. and the light goes away. When the door is reopened the light returns at 3.0 lbs. I have unplugged and defrosted the unit, cleaned the coil in the back on the bottom. I am handy . Please help!
I need more info. When the temperature rise, what is not running, compressor or evaporator fan?
Both the condensor fan and the evaporator fan were running. I did find a small leak in the water inlet valve and water in the pan below it. I turned off the water so there is no more leak and no ice but the original problem persists. I will replace the water inlet valve Part Number: AP3192626.opened the main board compartment and it looks ok.
Thanks for your help.
Your compressor migh be intermittent, pull out the motherboard and look for bad solder connections behind the big power relay.
The solder on the motherboard behind the largest black relay does look bad. I will order and install a new motherboard and let you know if it works.
Thank you.
Very good, if any more problems just post.
Replaced the mother board and water inlet valve. The 3.0 lbs light is off but the freezer temp is still erratic ( -6 to 18 to -6).
Thank you.
Somthing is causing the erratic temperatures, unless the freezer is empty.
PSS26SGRAS:
Problems began with freezing produce with the freezer compartment maintaining zero degrees. Based on some posts replaced the mother board only to discover the damper door drive pivot post was broken. Took the damper apart, super glued the pivot post, reinstalled it and all was well. Ordered a new damper assembly and returned the mother board. New damper arrived and now I have the express thaw 3.0 lbs light on the freezer temp holds at zero or minus one and the produce side holds at thirty six. Only complaint now is the express thaw light / cycle. About to re-install the repaired damper and see if the problem goes away. this is crazy.
Must add. Sometimes the express light is on (when the door is opened) but no noise from motors / fans. With the door open switch cheated the light is off.
Good work, without seeing item, hard to diagnose.
Thinking about replacing the board AGAIN. Cannot seem to git rid of that 3.0 lb thaw light. Fan seems to be running more then it should.
Good GE experience this morning!
Unable to get the 3.0 lb thaw light to go out re-installed the old, repaired damper to see if I would have to go the mother board with no luck. Got a GE customer service number from GOOGLE and got a PERSON (Sue) quickly! There is a reset sequence and it may be necessary to do every couple of years. Must push/hold FREEZER WARMER, FOOD COLDER and the EXPRESS THAW buttons simultaneously. The thaw light will blink and go out…Kill the breaker or unplug for ten seconds and all is well. 
Good you got it fixed. Will keep the info for use if I ever work on one of these.
There’s an update to this post