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Error code reference

Vision Washer Error Code dr:21

Line over voltage error (long)

Vision codesVision washer codes

Line over voltage error (long) – weak power supply.

First step from the service manual

Wait, check line voltage.

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

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  • Step-by-step tests with expected resistance, voltage, and continuity values
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What dr:21 means on a Vision washer

The dr:21 error code on a Vision washer indicates a line over voltage condition that has persisted for an extended duration, which the control system classifies as a "long" over voltage event. The washer's control board continuously monitors incoming AC line voltage, and when it detects that voltage is running significantly above the acceptable operating threshold for a prolonged period, it triggers this fault to protect internal electronics and motor components from potential damage. The designation of "long" distinguishes this fault from a brief voltage spike, indicating the elevated voltage condition is sustained rather than transient.

The root cause is identified as a weak or unstable power supply, which may seem counterintuitive since the condition involves over voltage rather than under voltage. In this context, a weak supply refers to a power infrastructure that lacks proper voltage regulation, causing supply voltage to rise above nominal levels. This can occur due to issues with the utility grid, problems in the home's electrical panel, a shared circuit with heavy loads that cause voltage fluctuations, or a neutral wire fault that creates voltage imbalance.

The recommended first diagnostic step is to wait and then check the incoming line voltage at the outlet or junction supplying the washer. Technicians should use a true RMS multimeter to measure AC voltage at the receptacle and confirm it falls within the acceptable range for the appliance. If the voltage reading is elevated above standard residential nominal voltage, the issue lies with the power supply circuit rather than the washer itself, and the electrical supply must be corrected before the washer will operate normally.

Source: manufacturer service documentation.

Common causes of dr:21

  1. 01

    Elevated utility grid voltage

    Wiring / connection

    The voltage supplied by the utility company may be running above nominal levels, especially during periods of low neighborhood demand. Measure the outlet voltage with a multimeter to confirm whether it exceeds the acceptable range.

  2. 02

    Faulty or loose neutral connection

    Part replacement

    A compromised neutral wire at the panel, meter, or outlet can cause voltage imbalance, pushing line voltage on one leg higher than normal. This is a potentially hazardous electrical condition that requires inspection by a licensed electrician.

  3. 03

    Overloaded or poorly regulated circuit

    Wiring / connection

    Sharing a circuit with other appliances or using a circuit with inadequate wiring can cause voltage fluctuations that trigger sustained over voltage events. Verifying that the washer has a dedicated, properly rated circuit is an important diagnostic step.

  4. 04

    Failed control board voltage monitoring circuit

    Part replacement

    If the incoming line voltage measures within normal range but the error persists, the control board's voltage sensing circuitry may be faulty, causing false over voltage readings. In this case, control board replacement would be required.

  5. 05

    Transient voltage surge from nearby equipment

    Part replacement

    Large appliances or industrial equipment on the same electrical service can introduce sustained voltage elevations that the washer's control registers as a long over voltage fault. Installing a dedicated line or surge protection device may resolve this.

See the test procedure for each cause

Frequently asked questions about dr:21

What does dr:21 mean on a Vision washer?
The dr:21 code on a Vision washer means the machine detected a sustained over voltage condition on the incoming AC power line, which it classifies as a long line over voltage error. The control board monitors supply voltage continuously and triggers this fault when voltage remains above acceptable limits for an extended period. The fault is attributed to a weak or unstable power supply rather than a problem internal to the washer. The recommended first step is to wait, then measure the line voltage at the outlet with a multimeter.
How do I fix the dr:21 error on my Vision washer?
Start by waiting a few minutes to allow any temporary voltage fluctuation to pass, then use a multimeter to check the AC voltage at the outlet supplying the washer. If the voltage is reading higher than the standard nominal level for your region, contact your utility provider or a licensed electrician to investigate the supply. If the outlet voltage is normal but the error keeps returning, the washer's control board may have a faulty voltage sensing circuit and may need to be replaced.
Is the dr:21 error on a Vision washer a safety concern?
Yes, sustained over voltage conditions can be a safety concern because elevated voltage can damage the washer's electronics, motor, and other components over time. If the high voltage is caused by a neutral wire fault in your home's electrical system, that condition can also pose a broader safety risk to other appliances and should be inspected by a licensed electrician promptly. The washer's shutdown behavior is a protective response designed to prevent internal damage.
Will resetting the Vision washer clear the dr:21 error code?
A reset may clear the dr:21 code temporarily, but if the underlying over voltage condition in the power supply has not been corrected, the fault will return. The code is triggered by actual voltage conditions the control board measures, so clearing it without fixing the power supply issue is not a reliable long-term solution. Always verify that line voltage is within the acceptable range before assuming a reset has resolved the problem.
How much does it cost to repair a dr:21 error on a Vision washer?
Repair costs depend entirely on the root cause. If the issue is with your home's electrical supply or wiring, electrician service calls and wiring repairs can range from around $100 to $400 or more depending on the scope of work. If the washer's control board is the cause of false over voltage readings, control board replacement parts and labor can range from approximately $150 to $350. In many cases, no parts are needed if the fix simply involves correcting the power supply circuit.

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