Error Code: F12 Difficulty: Hard
Problem: Water intake fault at the start of a cycle, with no pulses detected from the flow meter.
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.
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.
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Bosch dishwasher water inlet valveCommon replacement category: Water inlet valveFit note: Exact OEM part number varies by full Bosch dishwasher model number. Confirm compatibility before buying.Confidence: Medium
This category can be relevant for fill and water-supply faults after the tap, hose, and inlet screen are checked. -
Bosch dishwasher drain pumpCommon replacement category: Drain pumpFit note: Exact OEM part number varies by full Bosch dishwasher model number. Confirm compatibility before buying.Confidence: Medium
This category can be relevant for drain and standing-water symptoms after the filter, sump, and hose are checked. -
Bosch dishwasher circulation pumpCommon replacement category: Circulation pump / wash motorFit note: Exact OEM part number varies by full Bosch dishwasher model number. Confirm compatibility before buying.Confidence: Medium
This category can be relevant for wash, spray-arm, and circulation symptoms after filters and spray arms are checked.
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.
More options (for a better recommendation)
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Browse all Bosch error codes: Bosch Error Codes
When It’s Better to Replace Than Repair
Dishwasher repairs can add up quickly when the pump, control, heater, or leak-related parts fail.
Confirm cabinet width, water line, drain routing, electrical connection, and panel style before ordering.
For repair parts, verify exact fit with the full dishwasher model number before buying; these links are general replacement-appliance shopping options.
- [OK]Drain pump or circulation pump failure
- [OK]Leaking tub, door, or float-switch issues
- [OK]Heater or control failures on an older unit
- [OK]Repeated poor washing or drying performance
Recommended Dishwasher Replacement Options
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