Cove Dishwasher Error Code 100147

Error code 100147 on a Cove dishwasher indicates that the Main Control Module (MCM) is not receiving a valid signal from one or both NTC (Negative Temperature Coefficient) thermistors located within the wash pump assembly. NTC sensors are resistive temperature devices whose resistance decreases as temperature increases. The MCM continuously monitors the output from these sensors to regulate water temperature throughout the wash cycle. When the signal falls outside the expected range or drops out entirely, the MCM logs this fault and may interrupt the cycle to prevent damage from uncontrolled heating.

The wash pump houses the NTC sensors because accurate temperature measurement at the pump is critical for cycle control and wash performance. A signal failure can stem from a wiring issue, a failed sensor, or a physical obstruction at the sensor connection point. Notably, this error can appear alongside scaling problems, meaning mineral deposit buildup inside the pump can insulate or physically interfere with the sensor, causing erratic or absent readings even when the sensor itself is electrically intact.

Diagnosing this fault starts at the NTC sensor connectors inside the wash pump. Loose, corroded, or water-damaged terminals are common culprits. If the connections are secure and corrosion-free, the next step is measuring sensor resistance across the expected temperature range to determine if the sensor has drifted out of spec or failed completely. Scaling on internal pump components should also be assessed, as descaling the pump may resolve the fault without any parts replacement.