Ice maker quit working all together-no water in tray. Checked line & OK to water supply; arm functioning and down; gear intact in back. Model ED5FHEXTL00

to see if icemaker is still good pour a 1/2 cup of water into tray and wait for a day. make sure shutoff arm or switch is on or down (arm down) if it makes ice then the icemaker is ok. if it dont then hold up.
if it makes ice then either the water pressure is too low (or no water) or the water valve is bad. (to check water valve you need a volt meter).
ok back to hold up part... the icemaker actuallys controls the water valve so you can have no water but that doesnt mean the icemaker is bad. so here are the three possiblities to your problem:
ice maker
water vavle
not enough/no water
before you buy anything let me know and we can go over this again
hope this was helpful (or confusing sorry)

make sure you have strong water pressure to the frig.
Do the ice maker have a shutoff arm? or a shutoff switch? either way make sure it is on. by now there should be water in the icemaker tray. if not then manually pour 1/2 cup of water into the icemaker. if it does make ice then replace the water fill valve.
if there is ice still in the ice maker tray you still have to check the water fill valve before we can say the icemaker doesn't work.
need a meter to check the continunity of the water vavle. if the valve is open repalce valve, if there is continunity the the valve is good.
hope this is helpful. if you cant do this ask a friend who is an electrician to help you

First the arm has to be in the down position. It sounds like you said theres water in the ice maker. If thats the case then it should have frozed. The ice cannot drop unless the ice maker heater comes on. Then the ice maker scoops the ice and drops into the resoviour thingy. If you have ice in the ice maker tray but no ice in the bucket then the ice maker is defective.

Is the freezer cold enough? Should be close to 10 degrees.
Is there water or ice in the ice mold? If not put water in it and see if it dumps the ice after it’s frozen. If there is ice, lift the cut off arm and let it drop to see if it will start.
If it does dump the ice but don’t refill with water.
Try swapping the wires on the dual water inlet valve. Then try the water dispenser. The water should go to the ice maker. This will tell you weather or not the ice maker valve is working and if the line is clear.

The water inlet valve on the back of unit opens when the ice maker needs water. If the valve doesn't seal good because of sediment or wear it will continue to drip and when the water reaches the ice maker supply tube it will freeze. You can take the water line off the valve and watch to see if it drips.

The fill valve for the ice maker could be stuck partially open and dripping into the ice maker. If this is the case shut off the water line to the ice maker and if the water stops you will need to replace the ice maker fill vavle

the apparatus that distributes the water into the tray had been knocked out of balance when taking the tray out. We pulled the ice maker and replaced the apparatus back in it's proper location .

Hi and I hope this will help. You can manually turn the timer and see if any water is dispensed into the ice cube tray . If no water is dispensed check if the valve is any good . A solenoid in the valve opens to allow water in to the ice maker. Sometimes timers stick too.

Water frozen in the freezer supply line - you need to thaw out the freezer. About six hours, door open, turn freezer OFF. You'll need a cooler with dry ice for your frozen food. 99% certain it'll work after that.

buy an ice tray and freeze your own, it is a lot less stress full and wont cost you a fortune fixing the ice maker

change filter and defrost water lines if frozen