Only will dispense crushed ice, no cubes.

try using cube ice only for a few days

Check the evaporator system, that release the cubes, when that does not work the cubes stay stuck inside.

You have a solenoid switch which switches the dispenser back and forth from crushed to cube. It could be stuck or not working or the parts connecting it could be disconnected or broken. You will have to observe to see if any parts are moving and if any noise is coming from the solenoid
Remove the dispenser cover by gently prying starting at the bottom going round and round a little at a time to prevent from breaking it. When it's off the screws will be exposed to access the other components

This is normal if you have previously used the crushed ice mode. The refrigerator will continue to dispense crushed ice for some time until the reserves are depleted. If this continues for a longer period then shut down the refrigerator and remove the dispenser compartment, clean any remaining ice and reinstall it. Start the power supply and wait 5 hours for the ice to form. Use the cube mode and you will surely obtain ice cubes.

You have a solenoid switch which switches the dispenser back and forth from crushed to cube. It could be stuck or not working or the parts connecting it could be disconnected or broken. You will have to observe to see if any parts are moving and if any noise is coming from the solenoid

Check to see if there is any obstruction (object of any kind) in the ice cube mold area. If nothing found, you will have to replace the icemaker, as individual repair parts are not available.

I have a GE TFX25ppbaaa refrigerator. The ice maker corkscrew motor would run and provide crushed ice only. The corkscrew motor would not run when the switch was moved to the cubed ice ( half moon) setting.

I replaced the large Light/ water/ crushed ice/cubed ice switch , ( product service number GEH WR55X129 ) ( part number GE 162D6372 PO17 )and it fixed the problem. Cost was about $43.00.

You may be on the right track. Remove the ice bucket and check the square hole behind the ice bucket in the back wall of the freezer. You should be able to move the horizontal rod in it up and down with your finger. If not, it may be frozen in one position. If so, just warm the area a bit with a hair dryer to free it. Replace ice bucket and test. Another thing which may cause that is the ice auger itself may have separated from the drive shaft. (The icemaker itself has nothing to do with making "crushed" ice. It only makes cubes. The cubes are dispensed or crushed and dispensed at the front of the ice bucket using the auger and the metal parts there.) You might also want to verify that the long metal rod (which extends past the ice bucket and into that square hole) is able to move. (it is spring loaded)

There is a solinoid in the freezer section by the motor that turns the ice auger. Test it by selecting cubes and with the ice bucket out, open the door, hold the door switch so the lights turn out and push the dispenser button. It should make a loud snap and travel upward. If not then I would say you have a bad solinoid. If it does, then I would look at the bucket. the metal rod that runs along the side of the bucket opens a flap in the bucket that is supposed to let the full cubes drop. look for anything that might cause it to be hanging up.

test the solenoid voltage in auger assy. its a little tricky.