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Error code reference

Cove Dishwasher Error Code 050123

Wash pump drive system

Cove codesCove dishwasher codes

Wash pump drive system: Fatal IPM over temperature error.

First step from the service manual

Replace the MCM assembly.

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
  • Wiring diagram references and connector pinouts from the OEM service manual
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What 050123 means on a Cove dishwasher

Error code 050123 on a Cove dishwasher indicates a fatal IPM (Intelligent Power Module) over temperature error within the wash pump drive system. The IPM is an integrated component inside the MCM (Motor Control Module) assembly that regulates power delivery to the wash pump motor. When the IPM detects that its internal operating temperature has exceeded a safe threshold, it triggers this fatal fault to protect the motor and surrounding electronics from thermal damage. Because the fault is classified as fatal, the dishwasher will not resume normal operation until the underlying condition is resolved.

The wash pump drive system relies on the IPM to convert incoming power into precisely controlled output for the pump motor. Overheating of the IPM can result from sustained electrical overload, a failing or seized wash pump motor drawing excessive current, inadequate heat dissipation within the MCM assembly, or an internal failure of the IPM itself. When the module runs too hot for too long, the thermal protection triggers this fault code and shuts down the drive system entirely.

Because the IPM is integrated into the MCM assembly rather than being a separately serviceable component, the prescribed first diagnostic step is direct replacement of the entire MCM assembly. Before replacement, technicians should also inspect the wash pump motor for signs of binding or electrical failure, as a defective motor can cause repeated IPM overheating even after a new MCM is installed. Verifying that the pump turns freely and draws appropriate current will help confirm whether the motor itself is contributing to the fault.

Source: manufacturer service documentation.

Common causes of 050123

  1. 01

    Failed MCM assembly (internal IPM failure)

    Part replacement

    The Intelligent Power Module inside the Motor Control Module assembly can fail internally, causing it to overheat even under normal operating loads. Replacing the MCM assembly is the primary recommended repair step.

  2. 02

    Wash pump motor drawing excessive current

    Part replacement

    A failing or partially seized wash pump motor can pull more current than the IPM is rated to handle, driving up module temperature until the fatal fault triggers. Inspect the motor for binding, unusual noise, or resistance values outside the normal range.

  3. 03

    Blocked or restricted wash pump

    Wiring / connection

    Debris lodged in the wash pump impeller can cause the motor to work harder than normal, increasing current draw and heat in the drive module. Check the pump and filter area for foreign objects before replacing components.

  4. 04

    Poor electrical connections or wiring harness issues

    Wiring / connection

    Loose or corroded connections in the wiring harness between the MCM and the wash pump can create resistance, generating additional heat in the power circuit. Inspect connectors for corrosion, melting, or loose terminals.

See the test procedure for each cause

Frequently asked questions about 050123

What does 050123 mean on a Cove dishwasher?
Error code 050123 indicates a fatal IPM (Intelligent Power Module) over temperature error in the wash pump drive system. The IPM is part of the MCM (Motor Control Module) assembly and is responsible for controlling power to the wash pump motor. When the IPM overheats beyond a safe limit, it shuts down the drive system and logs this fault. The dishwasher will remain inoperable until the MCM assembly is replaced and the root cause of the overheating is addressed.
Can I fix error code 050123 on my Cove dishwasher myself?
The primary repair for this fault is replacing the MCM assembly, which involves working with high-voltage components inside the dishwasher. DIYers with experience in appliance repair and comfort working around electrical systems may be able to perform this replacement. However, because the fault is classified as fatal and involves motor control electronics, most homeowners should have a qualified technician handle the repair. Before replacing the MCM, it is also important to inspect the wash pump motor to rule out a secondary cause.
Is it safe to use my Cove dishwasher while error 050123 is active?
No, you should not attempt to run the dishwasher while this error is active. The fault is classified as fatal, which means the wash pump drive system has been disabled by the control module as a protective measure. Attempting to force the machine to run could cause further damage to the motor or electronics. Disconnect power to the unit until repairs are completed.
Will resetting my Cove dishwasher clear error code 050123?
A simple power reset will not permanently clear this error code because it is a fatal fault tied to a hardware failure in the MCM assembly. Even if the code appears to clear after cycling power, the underlying thermal failure condition will cause it to return as soon as the dishwasher attempts to run the wash pump. A proper repair, specifically replacing the MCM assembly, is required for the fault to clear reliably.
How much does it cost to repair error code 050123 on a Cove dishwasher?
Repair costs will vary depending on parts and labor in your area. The MCM assembly for a Cove dishwasher is a higher-cost component, and total repair costs including parts and labor typically range from several hundred dollars to over five hundred dollars. If the wash pump motor is also found to be defective, that will add to the overall cost. Getting a diagnostic quote from an authorized Cove service technician before authorizing repairs is advisable.

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