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Error code reference

LG Refrigerator Error Code R-1016

Ice Pipe Heater Error

LG codesLG refrigerator codes

Ice Pipe Heater Error - detected as open error due to heater harness slipped out, contact error, or wire cut.

First step from the service manual

Separate MAIN PCB CN79 from PCB, check continuity between Blue and White wires; resistance should be within 72 ohm ±7%.

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

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What R-1016 means on a LG refrigerator

The R-1016 error code on an LG refrigerator indicates an Ice Pipe Heater open circuit fault. The ice pipe heater is a resistive heating element designed to prevent ice from forming in the water fill tube that supplies the ice maker. When the main PCB detects an open circuit in the heater circuit, it logs this error and may disable ice production to prevent damage from a blocked water supply line.

The root cause is almost always a wiring or connection issue rather than a failed heater element itself. The three primary failure modes are: a harness connector that has slipped out of its socket, a contact error at one of the connector pins due to corrosion or a bent terminal, or a physically cut or broken wire in the harness. Because this is flagged as an open error, the circuit is not completing at all, which points directly to a loss of continuity somewhere in the wiring path rather than a partial resistance shift.

The first diagnostic step is to disconnect the Main PCB connector CN79 and measure continuity and resistance between the Blue and White wires of the heater harness. A properly functioning ice pipe heater should measure approximately 72 ohms, with an acceptable tolerance of plus or minus 7 percent, meaning readings between roughly 67 and 77 ohms are within spec. A reading of infinite resistance or open circuit confirms a break in the heater element or its wiring. If resistance is within spec after reconnecting the harness, the issue was likely an intermittent connection at CN79.

Source: manufacturer service documentation.

Common causes of R-1016

  1. 01

    Disconnected harness connector at CN79

    Wiring / connection

    The heater harness connector at Main PCB port CN79 can work loose over time due to vibration or previous service work. This is the most common cause and should be checked first by reseating the connector firmly.

  2. 02

    Poor pin contact or corroded terminal

    Wiring / connection

    A bent, corroded, or oxidized terminal pin inside the CN79 connector or at the heater end of the harness can prevent a solid electrical connection. Inspect each pin visually and test for continuity after reseating.

  3. 03

    Cut or broken wire in the heater harness

    Part replacement

    A wire in the Blue or White harness leads can be pinched, cut, or broken due to routing issues or physical damage. This produces a permanent open circuit that will not resolve by reseating connectors.

  4. 04

    Failed ice pipe heater element

    Part replacement

    If resistance measured between the Blue and White wires reads infinite or far outside the 72 ohm plus or minus 7 percent specification, the heater element itself has failed internally and the component must be replaced.

See the test procedure for each cause

Frequently asked questions about R-1016

What does R-1016 mean on a LG refrigerator?
R-1016 indicates an Ice Pipe Heater open circuit error. The refrigerator's main control board detected that the heater responsible for keeping the ice maker water fill tube clear of ice is not completing its electrical circuit. This is most often caused by a loose harness connector, a contact issue at the connector pins, or a broken wire rather than a failed heater element.
Can I fix the R-1016 error myself?
A knowledgeable DIYer can start by locating connector CN79 on the main PCB and checking whether the heater harness has slipped loose, then reseating it firmly. You should also inspect the Blue and White wires along their entire length for any visible damage. Using a multimeter to confirm resistance of approximately 72 ohms between the two wires will tell you whether the heater element itself has failed and needs replacement.
Will resetting the refrigerator clear the R-1016 error?
A power reset may temporarily clear the error code from the display, but if the underlying wiring fault or failed heater element is still present, the code will return. The open circuit condition must be physically repaired before the error will clear permanently.
Is the R-1016 error dangerous or an emergency?
This error is not a safety emergency. It means the ice maker water tube may be at risk of freezing and blocking, which would stop ice production, but it does not affect the refrigerator's core cooling function. You can continue to use the refrigerator for food storage while scheduling a repair.
How much does it cost to repair an R-1016 error on an LG refrigerator?
If the fix is simply reseating a loose connector, labor costs for a service call typically range from around 75 to 150 dollars depending on your area. If the ice pipe heater element needs replacement, expect to add the cost of the part, which generally falls in the range of 20 to 60 dollars, plus any additional labor time for accessing and replacing the component.

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