Why Agilent Technologies Water Pump shows Open Cover error?
- SStephen PerezAug 30, 2025
The 'Open Cover' error on the Agilent Technologies Water Pump can appear if the top foam was removed during operation, so replace it. It can also occur if the foam is not activating the sensor or if the sensor is defective, in which case you should exchange the CSM board. Strong direct sunlight on the rear of the module can also trigger this error, so ensure the rear is not exposed to direct sunlight.














