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Error code reference

Cove Dishwasher Error Code 050199

Wash pump drive system

Cove codesCove dishwasher codes

Wash pump drive system: MOT1 (wash pump motor) system error. MCM has not detected a 'stop wash pump' command for 10 seconds and PWM is stopped, or MCM detected a fault when the inverter receives power.

First step from the service manual

Check the wash pump wire harness connections.

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

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What 050199 means on a Cove dishwasher

Error code 050199 on a Cove dishwasher indicates a wash pump drive system fault involving the MOT1 wash pump motor. Specifically, the Motor Control Module (MCM) has either failed to detect a 'stop wash pump' command within a 10-second window after PWM (pulse-width modulation) output has been halted, or the MCM detected a fault condition at the moment the inverter received power. The inverter is responsible for converting DC power to variable-frequency AC to control the wash pump motor speed, and any disruption in communication or power delivery between these components triggers this error.

The MCM continuously monitors the wash pump motor circuit and expects proper handshaking signals during startup and shutdown sequences. When the inverter powers up or down incorrectly, or when the MCM loses its ability to confirm the pump has stopped, the system flags this as a critical drive system error and halts operation. This protects the motor and inverter from damage caused by uncontrolled operation or power anomalies.

Common causes include loose or corroded connections in the wash pump wiring harness, a failing wash pump motor that draws abnormal current, a defective inverter board that cannot properly receive or transmit control signals, or a faulty MCM. Because the error can be triggered at either startup or shutdown, the fault could point to intermittent wiring issues as much as component failure. Starting diagnostics at the wire harness connections is the correct first step before replacing any parts.

Source: manufacturer service documentation.

Common causes of 050199

  1. 01

    Loose or damaged wash pump wire harness

    Wiring / connection

    Connectors in the wash pump wiring harness can loosen over time due to vibration or heat cycling, breaking the signal path between the MCM and the inverter. Inspect all harness connectors at the pump, inverter, and MCM for corrosion, bent pins, or loose seating.

  2. 02

    Faulty or failing wash pump motor

    Part replacement

    A wash pump motor that is seized, drawing excessive current, or intermittently failing can prevent the inverter from registering a proper stop command. Listen for unusual noises during operation and check motor resistance values against spec.

  3. 03

    Defective inverter board

    Part replacement

    The inverter converts power to drive the wash pump motor, and if it cannot properly receive power or relay control signals to the MCM, error 050199 is triggered. A failed inverter may show no visible damage and requires component-level testing or substitution to confirm.

  4. 04

    MCM (Motor Control Module) fault

    Part replacement

    If the MCM itself has failed or developed an internal fault, it may incorrectly report a missing stop command or misread the inverter power state. This is typically diagnosed after ruling out wiring and the inverter as the source of the fault.

  5. 05

    Intermittent power supply issue to the inverter

    Wiring / connection

    An unstable or insufficient power supply reaching the inverter during startup can trigger the MCM fault condition. Check for proper voltage at the inverter input and inspect for any upstream wiring issues or connection problems.

See the test procedure for each cause

Frequently asked questions about 050199

What does 050199 mean on a Cove dishwasher?
Error code 050199 indicates a wash pump drive system fault involving the MOT1 wash pump motor. The Motor Control Module (MCM) either did not detect a stop command from the wash pump within 10 seconds after PWM was halted, or it detected a fault when the inverter received power. The dishwasher stops operation to protect the motor and electronics from damage.
Will resetting the dishwasher clear error code 050199?
A power reset may temporarily clear the error code, but if an underlying fault exists in the wiring, motor, or inverter, the code will return once the dishwasher attempts to run the wash pump again. Resetting without diagnosing and correcting the root cause is not a lasting solution. Persistent recurrence of 050199 requires component-level inspection.
How do I fix error code 050199 on a Cove dishwasher?
Begin by checking all wire harness connections at the wash pump, inverter, and MCM for looseness, corrosion, or damage. If the connections are secure and undamaged, the next steps involve testing the wash pump motor and inverter board for faults. Depending on what is found, repairs may involve reseating connectors, replacing the wash pump motor, replacing the inverter, or in some cases replacing the MCM. This diagnosis is best performed by a qualified appliance technician.
Is it safe to use my Cove dishwasher while error 050199 is active?
No, it is not recommended to continue using the dishwasher while this error is present. Error 050199 indicates a fault in the wash pump drive system, and operating the appliance with a compromised motor or inverter could cause further damage to those components. The dishwasher will typically stop operation automatically when this code is triggered.
How much does it cost to repair a Cove dishwasher showing error 050199?
Repair costs vary depending on the failed component. If the fix is simply reseating a loose wire harness connector, costs may be limited to a service call fee, typically in the range of $75 to $150. Replacing a wash pump motor or inverter board will add parts and labor costs, potentially bringing the total to $200 to $600 or more depending on parts availability and local labor rates. Getting a diagnostic assessment first helps clarify what parts are actually needed.

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