Bosch Dishwasher Error Code E12 — How to Fix (Scale/lime buildup on heating element)

What Does Error Code E12 Mean?

What You'll Need

How to Fix Error E12 — Step by Step

1. 1

   Reset the Dishwasher

   Before attempting any repairs, try resetting the dishwasher by unplugging it from the power outlet and plugging it back in. This simple step can often resolve the issue and clear any error codes. Check the display to see if the error code E12 has cleared.

   💡 Pro Tip: Make sure to unplug the dishwasher from the power outlet to avoid any electrical shock.

2. 2

   Check the Heating Element

   Locate the heating element, usually found at the bottom of the dishwasher. Use a Phillips #2 screwdriver to remove the screws holding the element in place. Inspect the element for any signs of scale or lime buildup. If you notice any buildup, proceed to the next step.

   💡 Pro Tip: Be careful not to touch any electrical components, as they can be damaged by static electricity.

3. 3

   Clean the Heating Element

   Use a soft-bristled brush or a toothbrush to gently scrub away any scale or lime buildup from the heating element. If the buildup is severe, you may need to soak the element in a mixture of equal parts water and white vinegar for several hours. Then, use a soft cloth to wipe away any remaining buildup.

   💡 Pro Tip: Avoid using harsh chemicals or abrasive materials, as they can damage the heating element.

4. 4

   Inspect and Clean the Drain Pump Filter

   Locate the drain pump filter, usually found at the bottom of the dishwasher. Use a T20 Torx screwdriver to remove the screws holding the filter in place. Inspect the filter for any blockages or debris. Clean or replace the filter as needed.

   💡 Pro Tip: Make sure to check the filter regularly to prevent clogs and maintain proper dishwasher performance.

5. 5

   Check the Water Supply Hoses

   Inspect the water supply hoses for any kinks or blockages. Check the connections for any signs of leaks or damage. If you find any issues, replace the hoses or tighten the connections as needed.

   💡 Pro Tip: Regularly check the water supply hoses to prevent leaks and maintain proper dishwasher performance.

6. 6

   Consult a Professional

   If none of the above steps resolve the issue, it may be necessary to consult a professional appliance repair technician. They will be able to diagnose and repair any underlying issues with your dishwasher.

   💡 Pro Tip: Don't hesitate to seek professional help if you're unsure or uncomfortable with any aspect of the repair process.

When to Call a Professional

Related Bosch Dishwasher Error Codes

More Bosch Troubleshooting Guides

• Bosch Dishwasher Error E01 — Bosch Dishwasher error code E01 indicates a problem with the heater relay on the
• Bosch Dishwasher Error E09 — Bosch Dishwasher error code E09 indicates a heating element failure. This error
• Bosch Dishwasher Error E14 — Error code E14 on your Bosch Dishwasher indicates a flow sensor error. This mean

→ View all Bosch error codes