Here are some reasons the water pump could not be functioning
Check Connections
Make sure that both connectors between the Breakout Board and the water pump are secure. If you find the pump is sucking instead of pumping the connectors could be the wrong way around.
Review your code
Confirm that you are addressing the right port or using the right coding blocks in your program. Double-check any variables, loops, conditions, or events related to the water pump in your code.
Power Supply
Make sure the Breakout Board’s low battery indicator is not on. Low batteries can cause issues with connected components. Replace or recharge them if necessary.
Check for Errors
Look for error messages or warnings in the MakeCode editor or microbit LED display. These messages can provide clues about what might be going wrong in your code.
Inspect it
Check the water pump for any visible damage or obstructions that might be preventing it from functioning correctly. Being left in water for an extended period of time or not properly dried from the previous lesson may also cause internal damage.
Environmental Factors
Consider environmental factors that might affect the water pump's operation. For instance, if it's a submersible pump, ensure it's submerged in water if required.