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Hello
The ice maker thermostat closes a +9 degrees . You say your freezer temperature is at +12 degrees. This could be a cooling issue problem. One you get the unit down to -5 degrees to +5 degrees see the steps below for ice maker diagnostics. Also go to page #37 in the technician diagnostic link below.

Matt Ace technician

Step 1
Press the Rocker switch, Pin 2 and Pin 2a are connected. The ice maker is switched on. No part is working untill the thermostat reachs -9℃.
Step 2
Therostat connected the whole power circuit, motor is running and heater is switching on. 1st loop starts.
Step 3
During the 1st loop running, the ice level switch will be released once, but no effect on the power circuit. Motor is running and heater is on.
Step 4
When the notch of the ice cam run to the water valve switch, which means the ice cam switch is released, the water valve is switched on. Water comes into the ice maker. End of the 1st loop.
Step 5
Ice making progress. Every component of ice maker is at the same position as step 1, as soon as the thermostat reaschs -9℃, which means ice is ready, It can go forward.
Step 6
Beginning of 2nd loop. Motor is running, heater is switched on. When stripper runs into the ice position to take the ice out.
Step 7
Due to the thermostat is not over than 9℃, when the notch of ice cam runs to the water valve switch by the end of 2nd loop, the water vavle is not connected.
Step 8
Beginning of 3rd loop, motor is running, and heater is on, keeping heating the thermostat to reach 9℃.
Step 9
When thermostat is over than 9℃, the thermostat disconnected, but motor is keeping running till the notch of ice cam reaches the water valve switch.
Step 10
Same as step 4.
The new ice production cycle like following steps over and over again, untill the ice level switch detect that ice box if full of ice cubes.

When the ice box is full.
All components stay at the original position. No more working.
Self Diagnose mode
Switch off the freezer light and push the rocker switch to unstable position for more than 15seconds.
When the rocker switch is pressed position 1 will connect to 1a and position 2 will connect to position 2a. The Motor will drive the IM CAM turn CCW at about 0.33 RPM, the heater is switch on the same time. From original status the rocker switch should be pressed totally about 15 seconds. Then release the rocker switch, IM will go on to finished the self test.
Conditions for switching on the water valve to Ice maker
It must fulfill both following conditions, the valve can swith on and the water can enter the ice maker.
* Thermostat is open circuit
* Water valve microswitch is released
Datas of ice maker
Ice production rate in normal condition
EU/CN models 1700g/24h
US models 2000g/24h
Ice production rate in quick ice mode
2500g/ 24h for all models
Rotate speed of rotor 0.33rpm
Water filling time 4.8~5.3s
Open circuit temperature of Thermal fuse around 70℃/158℉
Close circuit temperature of Thermostat -9℃/16℉
Open circuit temperature of Thermostat 9℃/48℉

Hello
See the troubleshooting information links below. Run the unit through diagnostics. If you cannot get the unit into diagnostics, you will have no choice but to repalce the board. Matt Ace technician

Self Diagnosis: Press both buttons (EnergySaver– Alarm) simultaneously (No sound
when both buttons are pressed at the same time) ‟til the display quits blinking and
beeps, 8-12 seconds, then release and read Fault Codes. This will also cancel the Fault Mode created by self-diagnostics at power up.

Hello
Have you run the unit through the diagnostic mode ? If you have not go to page #32 in trhe technician service manual link below and run the unit through the diagnostic mode. This will tell you if there are any control board errors. If it does not shaow a board error, I woudls start out just replacing the thermistors . If you need the board later, you can always put it on if you continue to have issues. Matt Ace technician

Hello
You will need to run the unit throgh the diagnostic mode . See directions below. The complete diagnostics will be on page # 83 in the service manual link below. Matt Ace technician

Entering Service Diagnostics:
Enter Service mode by pressing the Water, Crushed, and Cubed buttons simultaneously for 3 seconds.
The display will show Enter Service Mode?
Press Yes. Use the FZ or FF increase/decrease buttons from display to select the appropriate mode. Once the
displays indicate the desired test mode, press any key, except the temperature adjustment buttons, to
run test.
The test mode must be selected within 5 minutes of entering the diagnostic mode. Otherwise, it will
time-out and normal refrigerator operation will resume.
Once a test mode is selected, the display will show the results of the mode selected. Run test 00 16 to exit diagnostics mode and return to normal operation.
The display will show Entering Service Mode.
The display will show 00 in the FZ temperature
display and 00 in the FF temperature display. All
the components will turn off, 3-way valve will go to
home position, dampers will go to closed position,
and the temperature display will fl ash 0 in each of
the FZ and FF displays.

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Hello

 The 0060 code is a  FZ Defrost Heater  that  is located on page #107 in the service manual link below. I can not find the 0510 error at this time. I believe the service bullitin could be you issuse see below. 

If you are haveing the possible symptoms below you model is listed . Click on the service bullitin link below.
• Fresh food temperatures warm overall
• Fresh food temperatures warm in the top of the compartment and freezing at the bottom
• Fresh food temperature intermittently warm, then cools normally
• Excessive fresh food fan sounds from the fan surging while attempting to reach normal operating speed
• No display on the UI (User Interface)
• Interior LED lighting inoperative
• Compressor not running
• Complete shutdown of refrigerator

Models effected
CFE28TSHBSS DFE29JGDGWW GFE26GSHDSS GFE29HMEHES GNE29GMHCES PWE23KGDDWW
CFE28TSHCSS DFE29JGDHBB GFE27GGDEBB GFE29HMEIES GNE29GSHBSS PWE23KGDEBB
CFE28TSHDSS DFE29JGDHWW GFE27GGDEWW GFE29HMEJES GNE29GSHCSS PWE23KGDEWW
CFE29TSDESS DFE29JGDIBB GFE27GMDFES GFE29HSDGSS GYE22KMHBES PWE23KMDCES
CFE29TSDFSS DFE29JGDIWW GFE27GSDESS GFE29HSDHSS GYE22KMHCES PWE23KMDDES
CWE23SSHBSS DFE29JMDHES GFE28HGHBBB GFE29HSDISS GYE22KMHDES PWE23KMDEES
CWE23SSHCSS DFE29JMDIES GFE28HGHBWW GNE26GGDEBB GYE22KSHBSS PWE23KSDCSS
CYE22TSHBSS DFE29JMDJES GFE28HGHCBB GNE26GGDEWW GYE22KSHCSS PWE23KSDDSS
CYE22TSHCSS DFE29JSDGSS GFE28HMHBES GNE26GGDFBB GYE22KSHDSS PWE23KSDESS
CYE22TSHDSS DFE29JSDHSS GFE28HMHCES GNE26GGDFWW PFE27KSDESS PYE22PSHBSS
CYE23TSDESS DFE29JSDISS GFE28HMHDES GNE26GMDFES PFE28RSHBSS PYE22PSHCSS
CYE23TSDFSS GFE26GGHCBB GFE28HSHBSS GNE26GMDGES PFE28RSHCSS PYE22PSHDSS
DFE28JGHBBB GFE26GGHCWW GFE28HSHCSS GNE26GSDFSS PFE28RSHDSS PYE22PSHFSS
DFE28JGHBWW GFE26GGHDBB GFE28HSHDSS GNE26GSDGSS PFE28RSHESS PYE23KSDESS
DFE28JGHCBB GFE26GGHDWW GFE29HGDGBB GNE29GGHBBB PFE29PSDESS PYE23PSDESS
DFE28JMHBES GFE26GMHBES GFE29HGDGWW GNE29GGHBWW PFE29PSDFSS ZWE23ESHBSS
DFE28JMHCES GFE26GMHCES GFE29HGDHBB GNE29GGHCBB PWE23KGDCBB ZWE23ESHCSS
DFE28JSHBSS GFE26GMHDES GFE29HGDHWW GNE29GGHCWW PWE23KGDCWW ZWE23PSHBSS
DFE28JSHCSS GFE26GSHBSS GFE29HGDIBB GNE29GMHBES PWE23KGDDBB ZWE23PSHCSS
DFE29JGDGBB GFE26GSHCSS GFE29HGDIWW

Here are some links that may help.

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Here is a manual on the unit.

Here is a service manual that might help.

Here are some links that may rectify this issue.

Here is a service manual for the unit.

Here is a service manual for the unit.

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I will link a service manual for the unit below.

Hello
It may be possible that the thermostat bulb was installed in the wrong location resulting in the Refrigerator Compartment operating too cold. See the service bullitin below. I think this could correct your issue.
Matt Ace technician

Below is a service manual for the unit.