The float assembly in a dishwasher helps regulate the water level in the tub. As water fills the tub, the float rises, and when it reaches a certain level, it triggers the float switch to turn off the water flow. In some dishwashers, the float switch is only used to prevent overfilling, with the water level regulated by the timer.
Caution: Please read our safety information before attempting any testing or repairs.
Important Safety Notice: Before testing the float assembly, unplug the dishwasher or shut off the power at the fuse box or breaker panel to avoid an electrical shock hazard.
Tools and Materials Needed
- Screwdriver (Phillips and flat-head)
- Needle-nose pliers (if needed)
- Safety gloves
Steps to Check the Float Assembly
Step 1: Safety First
- Turn Off Power: Ensure that the dishwasher is unplugged or the circuit breaker is turned off to prevent any electrical shock.
- Turn Off Water Supply: If necessary, turn off the water supply to the dishwasher.
Step 2: Access the Float Assembly
- Open the Dishwasher: Open the dishwasher door and remove the bottom rack to gain clear access to the float assembly.
- Locate the Float: The float is typically located at the bottom of the dishwasher tub.
Step 3: Remove the Float Cover and Inspect the Float
- Remove the Float Cover: If the float has a cover, remove it. The cover may snap in place or be secured with a screw. Use a screwdriver to remove any screws and then lift off the cover.
- Lift and Drop the Float: Lift and drop the float several times. It should move freely. If the float sticks, it may prevent the dishwasher from filling or draining properly.
- Inspect for Obstructions: Remove the float and look for obstructions that may interfere with its free movement. The float usually snaps in place. If it does not come off with a small force, it may have to be disconnected from the float switch first.
Step 4: Check the Float for Damage
- Inspect the Float: Check the float for any visible signs of damage or wear. If the float is damaged, it should be replaced.
Step 5: Test the Float Switch
If you found no obstructions and the float moves freely, but the problem persists, you should test the float switch.
Testing the Float Switch:
- Locate the Float Switch: The float switch is usually located directly beneath the float inside the access panel below the dishwasher door.
- Remove the Access Panel: Remove the lower access panel using a screwdriver. The panel is typically held in place by screws either above or below it.
- Disconnect Wires: Disconnect the wires connected to the float switch. Use labels or masking tape to mark the wires for reconnection.
- Test for Continuity: Use a multimeter set to the ohms setting (Ω). Touch one probe to each terminal of the float switch. If the switch is functioning correctly, you should get a reading of zero or near zero, indicating continuity. If the multimeter shows no continuity (infinite resistance), the float switch is faulty and needs to be replaced.
Step 6: Reassemble the Dishwasher
- Replace the Float: If the float was removed, snap it back into place.
- Replace the Float Cover: If there was a cover, snap it back into place or secure it with a screw.
- Reattach the Access Panel: Replace the lower access panel by securing it with screws.
- Replace the Bottom Rack: Put the bottom rack back into the dishwasher.
Step 7: Test the Dishwasher
- Restore Power and Water Supply: Turn the power and water supply back on.
- Run a Test Cycle: Run a short test cycle to ensure the dishwasher operates correctly and the float assembly functions properly.
Tips and Warnings
- Consult the Manual: Always refer to your dishwasher’s user manual for specific instructions related to your model.
- Use Genuine Parts: Use genuine replacement parts for optimal performance and longevity.
- Check for Leaks: After reassembly, check for any leaks around the float assembly area.
- Seek Professional Help: If you are unsure about any step or if the problem persists, consider seeking help from a professional technician.
By following these steps, you can effectively check and ensure the proper functioning of the float assembly in your dishwasher. Regular maintenance and timely repairs will help keep your dishwasher running efficiently and extend its lifespan.
