Hollow ice cubes. Ocassional clunk sound and

Hi,
Hollow ice cubes are a result of lack of water to ice maker. This can be caused by lack of water pressure (clogged filter, bad water valve, obstructed fill tube, etc..) you will need to find the cause to correct this hollow ice cube issue. The ice maker should take on 5.5 oz of water when it cycles (2/3 cup). Mot of the time its a water supply issue and the line could be kinked behind the unit as it was rolled back into place.

Good Luck

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Sounds like a filter or line is clogged.

Check water pressure, low pressure will cause hollow ice.

Hi,
Hollow ice cubes are most often cause by insufficient water supply. Icemakers fill for about 7.5 seconds, resulting in about 4.75 oz. (140 cc) of water into the ice cube mold. If there s not enough water pressure available at the fridge, cubes may end up hollow and/or the fill could continue to dribble, eventually causing the fill tube to freeze closed.
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Whats happening is the ice isnt freezing all the way. Try cleaning your condensor's under the frig.In Hotter weather when condensor's get filled with dust it causes the frig to cycle to ofeten. In turn your cubes aren't freezing all the way.

some fridges are designed to make hollow cubes where they always hollow or just recently

Most ice makers have an adjustment screw to control the cube size. Its usually hidden behind a plastic panel on the front of the ice maker. A quarter turn either way and some trial and error testing should get you pointed in the right direction to your ideal ice cube.

Hollow cubes are usually a result of lack of water supply

Low water pressure usually the cause of that, just like when you get hollow ice cubes as explained here:
http://www.applianceaid.com/icemaker.html#hollow (http://www.applianceaid.com/icemaker.html#hollow)

Hollow ice cubes are due to low water pressure to the fridge. Water thru the door should have good pressure behind it. This is a good indicator of water pressure. Should be able to fill a glass quickly. Causes for low pressure are self-piercing saddle valves on the water line (switch to drill type (1/4") valve) or reverse osmosis system or filtering system on water line to the fridge. R.O. systems should not be used. Increase water pressure and that will fix the hollow cubes. The loud noise may be the sound of the water valve on the fridge when it is acivated. This sound is normal and some are louder than others.