mypros+
Error code reference

Vision Washer Error Code Er:24

Power supply relay to inverter damaged

Vision codesVision washer codes

Power supply relay to inverter damaged – power supply relay stuck.

First step from the service manual

Replace control.

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

MyPros+ Max

Get the full diagnostic procedure for Er:24.

  • Step-by-step tests with expected resistance, voltage, and continuity values
  • Wiring diagram references and connector pinouts from the OEM service manual
  • Verified part numbers when replacement is required
Get the full procedure

$29/month · Cancel anytime · Or $9.95 3-day pass

What Er:24 means on a Vision washer

Er:24 on a Vision washer indicates a fault with the power supply relay that feeds the inverter board. This relay is responsible for switching high-voltage AC power to the inverter, which in turn drives the variable-speed wash motor. When the control detects that this relay has become stuck in either the open or closed position, or that it has been internally damaged, it triggers Er:24 and halts operation to prevent further electrical damage or motor failure.

A stuck relay is one of the most common forms of relay failure. Relay contacts can weld together from repeated high-current switching, particularly if the motor has experienced overload conditions or if voltage spikes have occurred on the supply line. A relay stuck closed is especially hazardous because it can cause the inverter to remain energized even when the control is commanding it off. A relay stuck open will prevent the motor from receiving power at all, causing the washer to stop mid-cycle.

Because the relay is integrated into the main control board in most modern washer designs, the recommended first diagnostic step is direct replacement of the control board. Isolating the relay as a standalone component is generally not practical without advanced electronics testing equipment, and board-level repair is rarely cost-effective. Before replacing the control, technicians should verify that line voltage is within acceptable range and that there are no obvious signs of burning or arcing on the board or wiring harness connectors.

Source: manufacturer service documentation.

Common causes of Er:24

  1. 01

    Welded or stuck relay contacts on control board

    Part replacement

    Repeated high-current switching can cause the relay contacts to weld together internally, leaving the relay stuck open or closed. This is the primary cause of Er:24 and is confirmed by replacing the control board.

  2. 02

    Internally damaged relay from voltage spike

    Part replacement

    A power surge or voltage spike on the supply line can burn out the relay coil or contacts inside the control board. Inspect the board for discoloration or burn marks near the relay component.

  3. 03

    Failed control board from general wear

    Part replacement

    Over time, thermal cycling and normal wear can degrade relay components on the control board even without a specific overload event. If no external cause is identified, board failure is likely.

  4. 04

    Overloaded motor causing excessive relay switching

    Part replacement

    A worn or failing wash motor that draws excessive current can stress the power supply relay through repeated high-load switching cycles, accelerating contact failure.

  5. 05

    Loose or corroded wiring harness connections

    Wiring / connection

    Poor connections at the control board harness can cause voltage irregularities that stress the relay circuit. Inspect all connector pins at the control board for corrosion, looseness, or heat damage before replacing the board.

See the test procedure for each cause

Frequently asked questions about Er:24

What does Er:24 mean on a Vision washer?
Er:24 indicates that the power supply relay connecting the control board to the inverter has been detected as damaged or stuck. The relay controls high-voltage power delivery to the motor drive system. The washer stops operation when this fault is detected to prevent damage to the inverter or motor. Replacing the control board is the recommended fix.
Can I fix Er:24 myself on a Vision washer?
The repair requires replacing the main control board, which involves working near high-voltage components. Technicians with experience in appliance electronics can perform this repair, but it is not recommended for general DIYers without electrical training. Before replacing the board, check that wiring harness connectors are fully seated and free of corrosion.
Will resetting the washer clear the Er:24 error?
A power reset may temporarily clear the error code, but if the relay is physically damaged or stuck, the fault will return as soon as the machine attempts to power the inverter again. A reset does not repair the underlying relay failure. The control board will need to be replaced to resolve the issue permanently.
Is it safe to continue using my Vision washer when Er:24 is displayed?
No, it is not safe to continue operating the washer with Er:24 active. A relay stuck in the closed position can leave the inverter energized when it should be off, creating a risk of overheating or electrical damage. Discontinue use until the control board has been inspected and replaced as needed.
How much does it cost to repair Er:24 on a Vision washer?
The main cost is the replacement control board, which typically ranges from around $80 to $250 or more depending on the specific model. If you hire a technician, labor costs will add to the total, generally bringing the repair into the $150 to $400 range. Getting a repair estimate before proceeding is advisable to compare against the cost of replacement.

Related Vision washer codes

All Vision washer codes
View all 34 Vision washer codes

78,000+ service manuals · 160,000+ error codes · 55+ brands

Get Started

$29/month · Cancel anytime · Or $9.95 3-day pass