Cove Dishwasher Error Code 300137

Error code 300137 on a Cove dishwasher indicates that water has been detected where it should not be. Specifically, the unit monitors two separate sensing mechanisms for this condition: a conductivity sensor located in the base pan of the unit, and a pressure sensor that watches for overfill conditions inside the tub. The conductivity sensor works by detecting the presence of water through electrical conductivity between two probes. When water bridges those probes in the base pan, the circuit completes and triggers the fault. The pressure sensor independently monitors water level, and if an overfill condition is detected, it also triggers error 300137.

The most common root cause is a minor leak from an internal component, such as a door gasket, a hose fitting, a pump seal, or the spray arm assembly, that allows water to drip or pool into the base pan over time. In some cases, the error can be triggered by condensation accumulation or a small splash event rather than an active, ongoing leak. Because the conductivity sensor only requires a thin film of moisture to complete the circuit, even residual dampness from a prior event can keep the code active after the original source has been resolved.

The first step in diagnosing this code is to shut off the water supply to the dishwasher immediately to prevent further water entry. The base and conductivity sensor must then be thoroughly dried using towels, a wet vacuum, and either canned compressed air or a hair dryer before power-cycling the unit. If the error returns after the unit is fully dried and power-cycled, an active internal leak is the likely culprit and a more detailed inspection of internal plumbing components is necessary.