Cove Dishwasher Error Code 800140

Error code 800140 on a Cove dishwasher relates to the MOT4 drain pump motor circuit. This fault triggers when the drain pump has been running continuously for longer than the control board considers acceptable during a drain cycle, or when the secondary pressure check system determines that a drainage problem cannot be resolved through automatic correction attempts. The dishwasher's control system monitors how long the pump runs and uses pressure feedback to confirm that water is actually being removed. If either condition fails, the unit halts the cycle and stores this fault code.

The most common root cause is a physical restriction somewhere in the drain path. This includes clogs in the drain filter assembly, a kinked or blocked drain hose, or a restriction at the sink drain connection or garbage disposal inlet. When water cannot exit the tub efficiently, the pump keeps running in an attempt to clear the water, eventually exceeding its allowed run time and triggering the fault.

In some cases, the drain pump motor itself may be worn or failing, drawing excess current or running inefficiently without moving adequate water volume. The secondary pressure check mechanism, which attempts to verify successful drainage, may also point to a faulty pressure sensor or wiring issue if the drain path is confirmed clear. Always start by inspecting and cleaning the drain filter, checking the drain hose for kinks or blockages, and confirming the sink drain connection is unobstructed before moving on to component-level diagnosis.