Rust inside a dishwasher is a common issue that can lead to stained dishes, reduced efficiency, and even damage to the appliance over time. Addressing rust promptly can prolong the life of your dishwasher and maintain its effectiveness.
Signs of Rust in a Dishwasher
1. Rusted Racks or Tines
• Visible rust spots on the racks or prongs that hold dishes.
2. Rust Stains on Dishes
• Dishes, especially those made of glass or plastic, come out with rust-colored stains.
3. Rust on the Interior Surface
• The stainless steel or plastic interior shows signs of rust or discoloration.
4. Rust Particles in Filters or Sprayers
• Tiny rust particles accumulate in the dishwasher’s filter or spray arms.
Common Causes of Rust in Dishwashers
1. Damaged Rack Coating
• The protective coating on dishwasher racks wears away, exposing the metal underneath, which can rust.
2. Hard Water Deposits
• Hard water contains minerals that can lead to rust formation over time.
3. Faulty Water Supply
• Rust in the water supply can deposit inside the dishwasher.
4. Improper Cleaning Products
• Using harsh or unsuitable detergents can degrade the interior finish or coatings.
5. Moisture Trapped After Use
• Standing water or excess moisture left inside the dishwasher can lead to rust development.
How to Address Rust in a Dishwasher
1. Repair or Replace Rusted Racks
• Seal with Tine Caps and Rack Coating:
• Apply replacement tine caps to rusted prongs.
• Use a dishwasher-safe rack coating repair kit to seal exposed metal.
• Replace Severely Rusted Racks: If rust is widespread, order replacement racks specific to your dishwasher model.
2. Remove Rust Stains from the Interior
• Clean with Vinegar and Baking Soda:
• Sprinkle baking soda over the rusted area, then spray or pour white vinegar.
• Let it sit for 30 minutes, scrub gently, and rinse.
• Use a Rust Remover:
• Apply a dishwasher-safe rust remover to the interior surfaces, following the product instructions.
3. Check the Water Supply
• Install a water softener or a rust filter if rust in your water supply is causing the issue.
4. Inspect and Clean Filters and Spray Arms
• Remove the filters and spray arms and clean out any rust particles or debris.
5. Run a Maintenance Cycle
• Run an empty cycle with a dishwasher cleaner or a mixture of citric acid and water to remove mineral deposits and prevent further rust.
Preventative Maintenance Tips
1. Repair Racks Promptly
• Regularly inspect and reseal any exposed metal on racks before rust forms.
2. Use a Water Softener
• Install a water softener if you live in an area with hard water to reduce mineral buildup.
3. Dry the Dishwasher After Use
• Leave the door slightly ajar after a cycle to let moisture escape, preventing rust.
4. Choose Appropriate Detergents
• Use dishwasher-safe detergents and avoid harsh cleaners that can degrade coatings or finishes.
5. Inspect Regularly
• Check the interior for early signs of rust and address them immediately to prevent spread.
When to Call a Professional
• Rust has compromised the structural integrity of racks or interior surfaces.
• Rust in the water supply persists despite installing filters or softeners.
• You’re unsure how to replace rusted components or need advice on preventive measures.
Conclusion
Rust in a dishwasher is a manageable issue if addressed early. Repairing rusted racks, removing stains from the interior, and ensuring a rust-free water supply can restore your dishwasher’s performance and extend its lifespan. Regular inspections, proper cleaning, and preventive measures can help keep your appliance rust-free and in excellent condition. For severe cases or persistent problems, consulting a professional ensures effective solutions.