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Appliance Fix Guide

Bosch Dishwasher error code

Bosch Dishwasher Error F12

Water intake fault at the start of a cycle, with no pulses detected from the flow meter.

Water intake fault at the start of a cycle, with no pulses detected from the flow meter.

Updated Aug 18, 2026
Diagnose before buying a part
Bosch dishwasher repair guide for error F12
Error codeF12Dishwasher

Try these first

Start here before buying a part or taking the appliance apart.

  1. 1
    Check 1

    Use a commercially available dishwasher descaler to remove limescale deposits by running a hot cycle.

  2. 2
    Check 2

    After descaling, reset the dishwasher by turning off the power at the circuit breaker for a few minutes.

  3. 3
    Check 3

    Ensure your dishwasher's water hardness setting is appropriate for your local water supply to prevent future buildup.

A quick explanation

What does F12 mean?

Water intake fault at the start of a cycle, with no pulses detected from the flow meter.

The answer you came for

How to fix Bosch dishwasher error F12

Start with the safest checks and work from simple to technical.

  1. 1

    Step 1

    1. Turn off the power to the dishwasher at the circuit breaker and shut off the water supply valve, which is typically located under the sink.

  2. 2

    Step 2

    2. Carefully pull the dishwasher out from under the counter to access the water connections. Place a towel underneath the water inlet hose connection to catch any residual water.

  3. 3

    Step 3

    3. Inspect the water inlet hose for any kinks or sharp bends that could be restricting water flow. Straighten the hose if necessary.

  4. 4

    Step 4

    4. Disconnect the water inlet hose from the dishwasher. Check the small filter screen inside the inlet valve for any debris or sediment buildup and clean it thoroughly with a small brush under running water.

  5. 5

    Step 5

    5. If the hose and filter are clear, the water inlet valve and flow meter assembly is likely faulty. This part is usually located on the left side of the dishwasher base. Disconnect the wiring harness and hoses attached to the old valve.

  6. 6

    Step 6

    6. Install the new water inlet valve assembly, ensuring all hose clamps and electrical connectors are securely fastened in the same positions as the original part.

  7. 7

    Step 7

    7. Reconnect the main water supply hose, slide the dishwasher back into place, turn the water supply and circuit breaker back on, and run a test cycle to ensure the error is resolved.

Read the additional checks from the current guide

How to Fix F12 Error (Step-by-Step) Turn off the power to the dishwasher at the circuit breaker and shut off the water supply valve, which is typically located under the sink. Carefully pull the dishwasher out from under the counter to access the water connections. Place a towel underneath the water inlet hose connection to catch any residual water. Inspect the water inlet hose for any kinks or sharp bends that could be restricting water flow. Straighten the hose if necessary. Disconnect the water inlet hose from the dishwasher. Check the small filter screen inside the inlet valve for any debris or sediment buildup and clean it thoroughly with a small brush under running water. If the hose and filter are clear, the water inlet valve and flow meter assembly is likely faulty. This part is usually located on the left side of the dishwasher base. Disconnect the wiring harness and hoses attached to the old valve. Install the new water inlet valve assembly, ensuring all hose clamps and electrical connectors are securely fastened in the same positions as the original part. Reconnect the main water supply hose, slide the dishwasher back into place, turn the water supply and circuit breaker back on, and run a test cycle to ensure the error is resolved. Turn the appliance off, wait about 2 minutes, then turn it back on. Parts Availability Note: For this Electrolux/Frigidaire error code, exact OEM part numbers can vary by model revision and serial range. We’ve listed the most likely component(s), but confirm compatibility using your full model number before ordering. If no exact SKU is shown, use this guide for diagnosis first, then verify the matching OEM part on RepairClinic or PartSelect. Recommended Parts to Check No exact official OEM part number is listed here because the correct Bosch dishwasher part can vary by complete model number. These are targeted part-category searches, not universal fit claims. Bosch dishwasher water inlet valve Common replacement category: Water inlet valve Fit note: Exact OEM part number varies by full Bosch dishwasher model number. Confirm compatibility before buying. Confidence: MediumThis category can be relevant for fill and water-supply faults after the tap, hose, and inlet screen are checked. Search Amazon for Bosch dishwasher water inlet valve Bosch dishwasher drain pump Common replacement category: Drain pump Fit note: Exact OEM part number varies by full Bosch dishwasher model number. Confirm compatibility before buying. Confidence: MediumThis category can be relevant for drain and standing-water symptoms after the filter, sump, and hose are checked. Search Amazon for Bosch dishwasher drain pump Bosch dishwasher circulation pump Common replacement category: Circulation pump / wash motor Fit note: Exact OEM part number varies by full Bosch dishwasher model number. Confirm compatibility before buying. Confidence: MediumThis category can be relevant for wash, spray-arm, and circulation symptoms after filters and spray arms are checked. Search Amazon for Bosch dishwasher circulation pump Before ordering: match the part to the complete Bosch dishwasher model number on the appliance tag. Still Not Working? If the replacement part didn’t fix the issue, you may have a wiring problem or main board failure. Browse all Bosch error codes: Bosch Error Codes

If the code comes back

Do not keep replacing parts based only on the code. Repeat the safe checks above. If the fault remains, stop and arrange qualified service rather than ordering from the code alone.

What may be causing it?

  • Limescale buildup in the dishwasher.

These are possibilities to investigate, not proof that one part has failed.

Recommended part

Recommended part for this error code

No replacement part recommended for this code

The researched guidance for Bosch Dishwasher error F12 points to user-action and diagnostic steps above rather than a mapped replacement part. We will not invent a part or send you to an unrelated product.

Replacement options

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If repairing this dishwasher no longer feels worthwhile, compare three replacement paths below.

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Repair or replace calculator

Use the age and total repair estimate to get a simple comparison. This is guidance, not a guarantee.

Safety first

Disconnect power before opening panels or touching internal parts.

When to stop
  • Stop if you see burned wiring, melted connectors, water near electrical parts, or a gas smell.
  • Do not perform live-voltage testing unless you are trained and equipped for it.
  • Use the exact model manual or service information before replacing electronic controls.

Free quick sheet

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