Troubleshooting error code E12 on a Bosch front load washer

Is your Bosch front load washer displaying error code E12? Don’t worry, this is a problem that you can fix yourself without the need for a costly service call and we’re here to help you do it!

If you find out that you need any replacement parts for your appliance while you’re troubleshooting, you can enter your model number at AppliancePartsPros.com to order them. Most orders arrive in just two business days, and we have thousands of free guides to show you how to install your new parts.

Important: The error code information provided in this article may not apply to your specific appliance model. The disassembly information is based on models starting with WFMC and WFXD. While we strive to offer helpful advice for DIY appliance repairs, variations in models and configurations can lead to differences in troubleshooting steps, error codes and part replacements. For the most accurate guidance, we strongly recommend consulting the technical sheet for your specific appliance model.

What the error code means

The E12 error code on a Bosch front load washer is an indicator of a “Water supply time exceeded” problem. This code indicates a problem with the water supply or the water inlet components within the washer. The inability to fill the machine with the required amount of water within the designated time frame can be caused by a variety of factors, such as a malfunctioning water inlet valve, a blockage in the water supply lines, or insufficient water pressure.

Read more: 10 Washing Machine Tips to Get Stains Out  

Safety precautions

When working on any appliance, remember to keep safety first. Here are some tips to keep in mind:

• Always power off and unplug your appliance or switch off the circuit breaker before attempting any maintenance or replacement work. This keeps you safe by preventing any risk of injury from electric shock.
• Wear insulated work gloves to protect your hands from sharp metal parts, pinching hazards and debris.
• Take your time and don’t rush while working to prevent accidents and personal injuries.
• Work in a well-lit area so you can clearly see and access the interior parts.
• Clear your workspace of clutter and other obstacles. Keep children and pets away from the work area.
• Never work on internal parts with bare wet hands. Make sure the work area is completely dry.
• Check your user manual to see if there are specific installation or safety instructions for your part or appliance.
• Be gentle when handling or removing parts. Excessive force might damage the appliance or cause injury.
• Wear safety glasses when working with chemicals, dust or cleaning large debris to prevent injury.
• If the appliance has recently been used, give it plenty of time for any heating parts to cool down before working on it.
• Take pictures or make a note of wiring terminals or other connections before disconnecting to prevent any problems with reassembly.
• When working with wires, avoid touching any exposed wires or terminals. If you need to touch a wire, use a non-conductive tool or wear insulating gloves to prevent electrical shock.
• Turn off the water supply at the outlet before beginning repairs to any appliance parts that hold water. Have towels ready for any residual water in the system when removing parts.

Read more: How to Decide What Water Temperature to Use for Laundry

Tools needed:

• Multimeter
• Pliers
• Towels or rags (to catch any water)
• Bucket (to drain water)
• Screwdriver (typically a Torx driver)
• Water pressure gauge (optional, for measuring water pressure)

Troubleshooting steps

Check the water supply

1. Make sure the water supply valves (hot and cold) are fully open.
2. Check if the hoses are kinked or twisted, as this could restrict water flow.
3. Verify that the hoses are not clogged or damaged.
4. If the pressure is low, this could be causing the issue. You can use a water pressure gauge to check if the water pressure is sufficient (typically 20-120 psi).
5. If the water pressure is too low, contact your water supplier or a plumber to address this issue.

Inspect the inlet hoses and filters

1. Turn off the water supply.
2. Remove the hoses from the washer’s inlet valves and place the ends in a bucket or sink to ensure that water flows freely when the valves are opened.
3. Check the filter screens at the inlet valve connections (the small mesh screens where the hoses attach to the washer). If they are clogged, clean them gently with a small brush and warm water.
4. Reattach the hoses once everything is clear.

Test the water inlet valve

1. The valve is typically located behind the washer, where the inlet hoses are attached. You may need to remove a panel or back cover to access it.
2. Set your multimeter to Ohms (Ω) to test the continuity of the valve.
3. Disconnect the wires from the valve terminals.
4. Place the multimeter probes on the terminals of the inlet valve.
5. If the multimeter reads a continuity (closed circuit) or gives a reading (typically 500-1500 Ohms, but check your washer’s manual for the exact range), the valve coil is likely functional.

Inspect the door seal and pressure switch

1. Make sure the door is properly sealed and latched. A door that doesn’t close tightly may prevent the washer from filling.
2. Inspect the rubber door seal for any damage or blockages. Clean it if needed.
3. The pressure switch monitors the water level inside the drum. If it’s malfunctioning, the washer may not recognize that it has filled with water.
4. Check the wiring to the pressure switch for damage and ensure it’s securely connected.
5. Unplug the wires from the pressure switch.
6. Use the multimeter to test the continuity of the switch.
7. If the switch does not show continuity when triggered, it may be faulty and needs replacement.
8. If all other parts are working correctly, the issue may lie with the washer’s control board, which controls the inlet valve and other water supply functions.

Read more: How To Prevent And Remove Mold From Your Front-Load Washer  

Additional information

Thank you for reading! We hope this guide helped you get your Bosch washer working again.

If you have any other appliance repair needs or projects, don’t hesitate to explore our other troubleshooting guides and videos.

If you need replacement parts or some extra help with ordering them, grab your model number and head over to AppliancePartsPros.com, where you can chat with a pro, read our DIY blog and more.

Be sure to subscribe to us on YouTube and follow us on Facebook, Twitter and Instagram!