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Error code reference

GE Refrigerator Error Code 43

The icemaker fill tube nozzle heater current is low (element open circuit)

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The icemaker fill tube nozzle heater current is low (element open circuit). Only seen with data download using Smart Tool.

First step from the service manual

Check the connections to the controller. Check the resistance of the heater (1.2 watts @ 120 ohms).

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

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What 43 means on a GE refrigerator

Error code 43 on a GE refrigerator indicates that the control board has detected a low current condition in the icemaker fill tube nozzle heater circuit, which the board interprets as an open circuit in the heating element. This heater is responsible for preventing ice from forming in the fill tube nozzle that delivers water to the icemaker mold. When the heater fails or loses continuity, water can freeze in the nozzle and block ice production entirely. This code is not visible on the refrigerator display itself and is only accessible by connecting a Smart Tool device to download diagnostic data from the control board.

The fill tube nozzle heater is a low-wattage resistive element rated at 1.2 watts with a nominal resistance of 120 ohms. When the control board measures current draw through this circuit and finds it below the expected threshold, it logs code 43. An open circuit means current cannot flow at all, which points to a broken element, a failed solder joint, or a wiring fault rather than a partial resistance shift. Because this is a resistive heating element, a simple continuity and resistance check will confirm whether the element itself is at fault.

Diagnosis should begin by inspecting the wiring harness connections at the control board and at the heater itself, as loose or corroded connectors can mimic an open circuit. If connections are secure, measure the heater resistance with a multimeter. A reading near 120 ohms confirms the element is intact, and the fault likely lies in the wiring or the board. A reading of infinite resistance (OL) confirms the element has an open circuit internally and requires replacement.

Source: manufacturer service documentation.

Common causes of 43

  1. 01

    Open circuit in the nozzle heater element

    Part replacement

    The resistive heating element inside the fill tube nozzle heater has broken internally, resulting in infinite resistance instead of the expected 120 ohms. Confirm by measuring across the heater terminals with a multimeter.

  2. 02

    Loose or disconnected wiring harness connector

    Wiring / connection

    A connector at the control board or at the heater itself may have worked loose, interrupting the circuit. Inspect both ends of the heater wiring harness and reseat any connectors that are not fully engaged.

  3. 03

    Broken or chafed wire in the heater circuit

    Part replacement

    Physical damage to the wiring between the control board and the heater can create an open circuit. Inspect the wire run for pinch points, abrasion damage, or visible breaks.

  4. 04

    Corrosion at the heater connector terminals

    Wiring / connection

    Moisture in the freezer compartment can corrode the connector pins over time, increasing resistance to the point where the board reads the circuit as open. Clean corroded terminals or replace the connector as needed.

  5. 05

    Faulty control board

    Part replacement

    If the heater measures correctly at 120 ohms and all wiring connections are secure, the control board may have a defective sensing circuit for this output. This is the least likely cause and should only be considered after all other checks are completed.

See the test procedure for each cause

Frequently asked questions about 43

What does 43 mean on a GE refrigerator?
Error code 43 on a GE refrigerator means the control board has detected low or zero current in the icemaker fill tube nozzle heater circuit, indicating the element is likely open. This heater prevents the water fill tube from freezing over. The code is not displayed on the unit itself and can only be read using the GE Smart Tool diagnostic device.
How do I fix error code 43 on my GE refrigerator?
Start by checking the wiring harness connections at the control board and at the nozzle heater. Next, use a multimeter to measure the heater resistance, which should read approximately 120 ohms. If the reading is infinite, the heater element has failed and needs to be replaced. If resistance is correct and connections are tight, the wiring or control board may need further inspection.
Will resetting my GE refrigerator clear error code 43?
A power reset may temporarily clear the stored fault code, but it will return as soon as the control board checks the nozzle heater circuit again and still detects an open circuit condition. The underlying cause must be repaired for the code to stay clear. Since the code is only visible via the Smart Tool, you would need to reconnect the tool after the reset to confirm whether it has cleared.
Is error code 43 on a GE refrigerator a safety concern?
Error code 43 is not a safety hazard in the traditional sense, but it does affect icemaker performance. Without a functioning fill tube nozzle heater, water can freeze in the fill tube and block ice production completely. Addressing the fault promptly will prevent a full icemaker shutdown and potential water backup issues.
How much does it cost to repair error code 43 on a GE refrigerator?
If only the nozzle heater element needs replacement, parts and labor costs typically fall in the range of $75 to $200 depending on your location and service provider. If the issue is simply a loose connector or corroded terminal, the repair cost may be limited to a service call fee, generally in the range of $50 to $100. Control board replacement, if required, would be the most expensive outcome and could range from $200 to $400 or more.

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