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Error code reference

GE Washer Error Code E40

VSD (Variable Speed Drive / Inverter) Health Error.

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VSD (Variable Speed Drive / Inverter) Health Error.

First step from the service manual

Check if washer can spin and agitate. If not, check for 5 VDC between black and white at inverter connector CN9. Replace inverter if present.

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

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What E40 means on a GE washer

The E40 error code on a GE washer indicates a VSD (Variable Speed Drive) health error, meaning the control system has detected a fault within the inverter that manages motor speed and torque. The inverter, sometimes called the Variable Speed Drive, is responsible for converting incoming AC power into a controlled DC output that drives the wash motor at variable speeds. This allows the machine to shift between slow agitation speeds and high spin speeds smoothly and efficiently. When the control board detects that the inverter is not responding correctly or reporting an internal fault, it throws the E40 code and typically halts drum movement.

The most direct way to assess the inverter's condition is to check whether the washer can still perform both spinning and agitating functions. If neither motion is possible, the inverter is likely the failed component. The diagnostic procedure calls for measuring DC voltage at the inverter connector CN9, specifically between the black and white wires. A healthy inverter should show 5 VDC at this connector. If 5 VDC is present but the machine still cannot spin or agitate, the inverter itself has an internal failure and requires replacement.

Common root causes include internal inverter component failure, wiring faults at the CN9 connector, and power supply issues preventing the inverter from receiving proper voltage. Because the inverter handles significant electrical loads during motor operation, it is one of the more failure-prone components in variable speed wash systems. Connector corrosion or a damaged harness can also mimic a failed inverter by interrupting the signal or supply voltage.

Source: manufacturer service documentation.

Common causes of E40

  1. 01

    Failed inverter (VSD) board

    Part replacement

    Internal component failure within the inverter is the most common cause of E40. If 5 VDC is confirmed at connector CN9 and the washer still cannot spin or agitate, the inverter board has failed and needs to be replaced.

  2. 02

    Missing or low 5 VDC supply at CN9 connector

    Wiring / connection

    If the voltage check at the black and white wires of connector CN9 shows less than 5 VDC or no voltage at all, the inverter is not receiving proper power. This could indicate a wiring problem or a fault in the component supplying that reference voltage.

  3. 03

    Loose, corroded, or damaged wiring at CN9

    Wiring / connection

    A poor connection at the CN9 inverter connector can interrupt the signal and voltage supply, triggering the E40 fault. Inspect the connector pins and wiring harness for corrosion, bent pins, or broken wire insulation.

  4. 04

    Control board failing to communicate with inverter

    Part replacement

    In some cases the main control board may not be sending or reading signals to the inverter correctly, causing a reported health error even when the inverter itself is intact. This is less common but worth considering if the inverter tests within spec.

See the test procedure for each cause

Frequently asked questions about E40

What does E40 mean on a GE washer?
E40 indicates a Variable Speed Drive health error, meaning the inverter that controls motor speed has reported an internal fault. When this error is active, the washer typically cannot spin or agitate. The inverter, also called the VSD, needs to be tested and in most cases replaced to resolve the problem.
Can I fix the E40 error myself on a GE washer?
The first diagnostic step involves checking for 5 VDC between the black and white wires at inverter connector CN9, which requires a multimeter and comfort working around appliance wiring. If the voltage is present and the washer still will not run, the inverter board needs to be replaced. This is a moderately advanced repair, and homeowners who are not comfortable with electrical testing should call a qualified technician.
Will resetting the washer clear the E40 code?
A power reset may temporarily clear the E40 code, but if the inverter has an internal fault the error will return as soon as the washer attempts to run the motor. Resetting does not fix the underlying hardware problem. The inverter must be tested and replaced if found to be defective.
Is it safe to use my GE washer while the E40 code is showing?
It is not recommended to continue using the washer while E40 is active. The error indicates the inverter is not functioning correctly, which means the motor may not operate at all or may behave unpredictably. Running the machine in this state could cause additional stress on connected components.
How much does it cost to fix a GE washer E40 error?
If the inverter board needs replacement, parts typically range from roughly $80 to $200 depending on the specific model. Adding professional labor, the total repair cost generally falls between $150 and $350. If the issue turns out to be a wiring or connector problem rather than a failed inverter, the cost can be considerably lower.

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