If your dishwasher is not draining water from the bottom but does drain when manually turned off and then on, it indicates a potential issue with the dishwasher's electronic control system. Here's a possible explanation for this behavior:
Stalled Drain Cycle: When you manually turn off and then on the dishwasher, you're essentially interrupting the current cycle, including the draining process. When you restart the dishwasher, it attempts to resume the drain cycle, and in doing so, it might overcome whatever was causing the blockage or obstruction in the drain system temporarily.
Control Board Glitch: Dishwashers are equipped with electronic control boards that manage various functions, including the draining process. Sometimes, these control boards can experience glitches or temporary malfunctions, causing irregular behavior in the drain cycle.
Here are some steps you can take to address the issue:
Check for Blockages: Before attempting any repairs, inspect the dishwasher's drain system for blockages. This includes checking the drain hose, air gap (if present), and the dishwasher's sump area for debris or clogs. Clear any obstructions you find.
Reset the Dishwasher: Try resetting the dishwasher by turning it off at the circuit breaker or unplugging it for a few minutes. This can sometimes help resolve minor electronic glitches in the control board.
Run a Test Cycle: After clearing any potential blockages and resetting the dishwasher, run a test cycle to see if it drains properly. If it drains correctly during the test cycle, the issue might have been a temporary glitch.
Check the Drain Pump: If the problem persists, there might be an issue with the drain pump. The drain pump is responsible for removing water from the dishwasher during the drain cycle. It could be faulty or clogged, preventing proper drainage. You might need to access and inspect the drain pump for any visible signs of damage or obstruction.
Seek Professional Help: If you're unsure about diagnosing or repairing the dishwasher yourself, it's best to contact a professional appliance repair technician. They have the expertise and tools to diagnose the issue accurately and perform any necessary repairs safely.
Remember to prioritize your safety when dealing with any appliance repairs, and always refer to the dishwasher's user manual for specific troubleshooting steps and guidelines.