Problems With Frozen Fill Tubes on an Ice Maker

Installation

• If the ice maker is not installed properly, low water pressure can cause the fill tube to freeze. This is because the valve that allows water in relies on pressure to close and stop the water flow at the proper time. If the proper pressure is not set at installation, the water will continue to flow or drip into the fill tube at a slow rate, eventually freezing in the tubes and blocking the flow of additional water. The correct water pressure can be found in the owners manual, and varies among models. In general, 20 psi is recommended for ice makers without water filters, and 35 psi for models with filters.

Blockage

• Debris from installation can block a fill tube. The debris stops the water flow, causing it to back up in the tube. This water eventually freezes and creates an additional blockage. The tubes must be cleaned both of the frozen water and the debris in order to function properly. In addition, minerals and sediment from hard water can also build up in the tube, eventually blocking it. Regular cleaning can prevent this problem.

Valve

• The valve that controls the flow of water to the fill tube can wear out over time, or eventually break, allowing water to continuously enter the tube, or drip slowly into it. This creates the same type of problem as incorrect installation or low water pressure and allows the water to freeze while it is still in the tube. A worn-out or broken valve should be replaced in order to stop the problem.

Filter

• On models with a water filter, fill tube problems can start at the filter. If it is not replaced or maintained regularly, hard water sediment can break free and block the tube, causing the water in it to freeze. An old filter can also allow the water to pass through virtually untreated, resulting in eventual sediment buildup in the tube that also blocks the flow of water and causes freezing. Replacing the filter regularly, according to the manufacturer's directions, can stop the filter from creating problems that affect the fill tube.