Siemens Dishwasher Error E12

⚡ Quick Answer: The Siemens Dishwasher E12 error indicates a malfunction related to the water inlet valve or the heating system. This often leads to insufficient wate... ✅ DIY Fixable

What Does Error E12 Mean?

The Siemens Dishwasher E12 error indicates a malfunction related to the water inlet valve or the heating system. This often leads to insufficient water heating, resulting in poor cleaning performance. Symptoms include the E12 code displayed during or after a cycle, ineffective cleaning, and visible limescale buildup on the heating element or in the tub. Descaling the dishwasher and checking the salt reservoir can often resolve this issue.

Common Symptoms:

  • Dishwasher displays E12 on digital display during or after a cycle
  • Water may not heat properly, leading to poor cleaning results
  • Possible visible limescale or residue on heater or in tub

Possible Causes

  • Heavy limescale buildup on the dishwasher’s heating element or heat exchanger (high)

How to Fix Error E12

DIY Fix Descale the dishwasher and check salt/softener

  1. Ensure dishwasher salt reservoir is filled with appropriate dishwasher salt.
  2. Verify the water hardness setting matches your local water hardness.
  3. Run a hot descaling cycle per Siemens instructions using recommended descaler.

Technician Only Inspect and clean/replace heating system components

  1. Disconnect power and water supply.
  2. Remove necessary panels to access the heating element and heat exchanger.
  3. Visually inspect for heavy limescale, and if severe, clean or replace affected components.
  4. Test heating circuit continuity and operation post‑service.

Parts needed: Heating element, Heat exchanger (if applicable), Associated sensors

🛑 When to Call a Pro:
  • If descaling does not clear the error after multiple attempts
  • If heating element inspection reveals damage or failed components
  • If user is uncomfortable performing descaling or internal inspection

Technical Specifications

wattage N/A
component Water Inlet Valve
resistance 500-1500 ohms
part_number Siemens 00620325
voltage_rating 230V AC

Common Questions

What does E12 error mean on Siemens Dishwasher?

E12 indicates a malfunction in the water inlet valve or heating system, leading to insufficient water heating and poor cleaning.

Can I fix Siemens Dishwasher E12 error myself?

Yes, you can descale the dishwasher and check the salt reservoir to potentially resolve the E12 error.

How much does it cost to fix E12 error?

Repair costs for the E12 error range from €50 to €200+, depending on parts and labor needed.

When should I call a technician for E12?

Contact a technician if descaling doesn't resolve the issue, if there's damage to the heating element, or if you're uncomfortable performing repairs.

Sources & References

Data last verified: 2026-01-25

User Comments (0)

Share your experience or solution below.

Be the first to comment!