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Error code reference

GE Refrigerator Error Code F518

Hot Water Low Flow Rate

GE codesGE refrigerator codes

Hot Water Low Flow Rate - Hot Water Disabled due to slow or no water flow.

First step from the service manual

Check water supply pressure, isolation valve, and flow meter.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

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What F518 means on a GE refrigerator

The F518 error code on a GE refrigerator indicates a Hot Water Low Flow Rate condition, which causes the appliance to automatically disable the hot water dispensing function. This code is triggered when the internal flow meter detects that water moving through the hot water circuit is either too slow or has stopped entirely. The refrigerator's control board monitors flow rate continuously during hot water dispensing operations, and when measured flow falls below the acceptable threshold, it shuts down the hot water feature to prevent damage to the heating components and to avoid dispensing water at incorrect temperatures.

The hot water system relies on adequate incoming water pressure and unrestricted flow through the water supply line, isolation valve, and internal flow meter. If any of these components are restricted, kinked, or faulty, the flow meter will register insufficient flow and trigger F518. Common points of failure include a partially closed or clogged isolation valve at the wall supply, low household water pressure, a kinked or pinched water supply line behind the refrigerator, or a flow meter that has become obstructed with mineral deposits or debris over time.

Diagnosing this code begins with verifying that the water supply valve behind the refrigerator is fully open and that household water pressure is within the range required for the appliance. The flow meter itself should also be inspected for blockages or failure, as a faulty meter can report low flow even when water pressure and supply are adequate. Addressing the root cause is necessary to restore hot water dispensing functionality.

Source: manufacturer service documentation.

Common causes of F518

  1. 01

    Partially closed or blocked isolation valve

    Wiring / connection

    The water supply shutoff valve behind the refrigerator may be partially closed or clogged with mineral buildup, restricting flow. Check that the valve is fully open and inspect it for debris or corrosion.

  2. 02

    Low household water pressure

    Wiring / connection

    If the home's water pressure is too low, the flow meter will detect insufficient flow and trigger F518. Test pressure at a nearby sink to confirm adequate supply before investigating internal components.

  3. 03

    Kinked or pinched supply line

    Wiring / connection

    The water line connecting the wall supply to the refrigerator can become kinked if the unit was recently moved or pushed too close to the wall. Pull the refrigerator out and inspect the entire length of the supply line for bends or compression.

  4. 04

    Clogged or faulty flow meter

    Part replacement

    The internal flow meter can become obstructed with mineral scale or debris, causing it to misread flow rates or stop functioning altogether. If supply pressure and valve position check out, the flow meter may need to be cleaned or replaced.

  5. 05

    Clogged water inlet valve or filter

    Part replacement

    A clogged water filter or a water inlet valve with mineral deposits can restrict flow enough to trigger F518. Replace the water filter if it is past its service interval and inspect the inlet valve for blockage.

See the test procedure for each cause

Frequently asked questions about F518

What does F518 mean on a GE refrigerator?
F518 indicates a Hot Water Low Flow Rate condition. The refrigerator's flow meter has detected that water moving through the hot water circuit is too slow or has stopped, so the control board disables the hot water dispenser to protect the system. The code points to an issue with water supply pressure, the isolation valve, or the flow meter itself.
How do I fix the F518 error on my GE refrigerator?
Start by confirming the water supply valve behind the refrigerator is fully open and that household water pressure is adequate. Check the supply line for kinks, and replace the water filter if it is overdue. If those steps do not resolve the issue, the flow meter may be clogged with mineral deposits or may have failed and could require cleaning or replacement.
Will resetting my GE refrigerator clear the F518 code?
A reset alone is unlikely to permanently clear F518 if the underlying flow problem has not been resolved. The control board will re-trigger the code as soon as it detects low or no flow again during a hot water dispense attempt. You must restore adequate water flow before the error will stay cleared.
Is the F518 error on a GE refrigerator a safety concern?
The F518 code is primarily a protective measure, not a safety emergency. The refrigerator disables hot water dispensing to prevent the heating components from operating without sufficient water flow, which could cause overheating. Normal refrigeration and cold water functions are typically not affected by this error.
How much does it cost to repair the F518 error on a GE refrigerator?
If the fix is as simple as opening a supply valve, adjusting the water line, or replacing a water filter, costs can range from a few dollars to around $20 to $50 for a replacement filter. If the flow meter or water inlet valve needs replacement, parts and labor combined can range from $100 to $300 or more depending on the technician's rates and part costs in your area.

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