The drying fan in a dishwasher helps to dry dishes more effectively by circulating air after the final rinse and drain cycle. If the drying fan does not start, it can lead to slower drying times and increased water spotting on glasses.
Caution: Please read our safety information before attempting any testing or repairs.
Important Safety Notice: Before testing the drying fan, 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
- Multimeter or continuity tester
- Safety gloves
- Labels or masking tape (for labeling wires)
Steps to Test the Drying Fan
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 Drying Fan
- Remove the Lower Panel: The drying fan is located behind the lower panel beneath the dishwasher door. This panel is usually held in place with two screws either above or below the panel.
- Open the Door: Open the dishwasher door to access the screws holding the lower panel.
- Remove the Screws: Use a screwdriver to remove the screws. You may need to close the door to fully remove the panel.
Step 3: Locate the Drying Fan
- Identify the Fan Hood: Note the location of the fan hood inside the dishwasher’s tub (usually back right or left). The drying fan is located beneath this hood in the access area.
- Access the Fan: The fan motor has two wires connected to it. Label the wires and connections using labels or masking tape so you can reconnect them properly later.
Step 4: Disconnect the Wires
- Remove Connectors: The wires are connected with slip-on connectors. Firmly pull the connectors off of the terminals. Do not pull on the wire itself. You may need to use needle-nose pliers to remove the connectors.
- Inspect for Corrosion: Inspect the connectors and terminals for corrosion. If either is corroded, clean or replace them as necessary.
Step 5: Test for Continuity
- Set the Multimeter: Set your multimeter to the ohms setting (Ω) or use a continuity tester.
- Test the Terminals: Touch one probe to each terminal of the drying fan motor.
- Reading: You should get a reading of zero or near zero, indicating continuity.
- No Continuity: If the multimeter shows no continuity (infinite resistance), the drying fan motor is faulty and needs to be replaced.
Step 6: Reassemble the Dishwasher
- Reconnect the Wires: If the fan motor passed the continuity test, reconnect the wires to the terminals. Ensure the connections are secure and free from corrosion.
- Reattach the Lower Panel: Replace the lower panel by securing it with screws.
- Close the Door: Ensure everything is properly aligned and close the dishwasher door.
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 drying fan is functioning 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: If the drying fan needs to be replaced, use genuine replacement parts for optimal performance and longevity.
- 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 test the drying fan in your dishwasher and ensure it operates correctly. Regular maintenance and timely repairs will help keep your dishwasher running efficiently and extend its lifespan.
