Bosch E15 Parts — Float Switch, Valve & Hose (2026)

You’re staring at your Bosch dishwasher, and it’s displaying the E15 error code. Water is pooling in the base pan, and you’re not sure what to do. Don’t worry; this comprehensive guide will walk you through everything you need to know to fix the issue.

What Bosch Dishwasher Error E15 Actually Means

The E15 error code on your Bosch dishwasher indicates that there’s water in the base pan. This usually happens when there’s a leak or a clog in the drainage system. The error is triggered by the float switch, which is located in the base pan. When the switch detects water, it sends a signal to the control board, and the E15 error code appears.

The float switch is a critical component that detects water levels in the base pan. If it’s faulty or clogged, it can trigger the E15 error code. In some cases, the issue might be with the inlet valve, drain hose, or other parts of the drainage system.

Quick Diagnostic Checklist

Before calling a professional or ordering replacement parts, perform these quick checks:

• Power cycle: Unplug the dishwasher from the power outlet, wait for 30 seconds, and plug it back in. This can sometimes reset the error code.
• Check the drain hose: Ensure the drain hose is not kinked, clogged, or damaged. Check the hose connections to the dishwasher and sink drain.
• Inspect the base pan: Look for any signs of water leakage or damage in the base pan. Check the float switch for any blockages or debris.

Root Causes (Ranked by Likelihood)

Here are the common causes of the E15 error code, ranked by likelihood:

1. Faulty Float Switch

• Description: The float switch is stuck or faulty, triggering the E15 error code.
• Verification: Check the float switch for any blockages or debris. Test the switch with a multimeter to ensure it’s functioning correctly.
• Fix difficulty: Medium
• Cost: $20-$50 (Bosch Float Switch 631199)

2. Clogged or Damaged Drain Hose

• Description: The drain hose is clogged or damaged, causing water to accumulate in the base pan.
• Verification: Inspect the drain hose for any kinks, clogs, or damage. Check the hose connections to the dishwasher and sink drain.
• Fix difficulty: Easy to Medium
• Cost: $20-$100 (Bosch Drain Hose 00298564)

3. Faulty Inlet Valve

• Description: The inlet valve is malfunctioning, allowing water to flow into the dishwasher continuously.
• Verification: Check the inlet valve for any signs of damage or corrosion. Test the valve with a multimeter to ensure it’s functioning correctly.
• Fix difficulty: Medium
• Cost: $50-$100 (Bosch Water Inlet Valve 622058)

4. Leaking Dishwasher Tub

• Description: The dishwasher tub is leaking, causing water to accumulate in the base pan.
• Verification: Inspect the dishwasher tub for any signs of damage or leaks. Check the tub seals and gaskets for any wear or damage.
• Fix difficulty: High
• Cost: $100-$500

5. Clogged or Faulty Drain Pump

• Description: The drain pump is clogged or faulty, preventing water from draining properly.
• Verification: Check the drain pump for any blockages or debris. Test the pump with a multimeter to ensure it’s functioning correctly.
• Fix difficulty: High
• Cost: $50-$200

Step-by-Step Fix for the Most Common Cause

The most common cause of the E15 error code is a faulty float switch. Here’s a step-by-step guide to replace the float switch:

Tools needed: Torx T20 screwdriver, Phillips screwdriver, Towels/sponge, Flashlight

Time estimate: 30 minutes to 1 hour

Safety warnings:

• Unplug the dishwasher from the power outlet before starting the repair.
• Wear protective gloves and safety glasses to avoid injury.

Step-by-Step Instructions:

1. Remove the kick plate: Use a Torx T20 screwdriver to remove the two screws holding the kick plate in place. Gently pull the kick plate away from the dishwasher.
2. Locate the float switch: The float switch is located in the base pan, near the drain hose connection.
3. Disconnect the 2-pin connector: Carefully disconnect the 2-pin connector from the float switch.
4. Remove the float switch: Use a Phillips screwdriver to remove the screw holding the float switch in place. Gently pull the switch out of the base pan.
5. Install the new float switch: Mount the new float switch in the base pan, ensuring it’s securely fastened with the screw.
6. Reconnect the 2-pin connector: Connect the 2-pin connector to the new float switch.
7. Test the float switch: Use a multimeter to test the float switch and ensure it’s functioning correctly.

Model-Specific Differences

Some Bosch dishwasher models are more prone to the E15 error code than others. Here are some model-specific differences:

• Bosch 800 Series: These models have a redesigned drainage system that’s less prone to clogs.
• Bosch Compact: These models have a smaller base pan and are more susceptible to water accumulation.

Repair Cost Breakdown

Here’s a breakdown of the estimated repair costs:

Prevention & Maintenance

To prevent the E15 error code from occurring in the future, follow these maintenance tips:

• Regularly clean the drain hose: Check and clean the drain hose every 3-6 months to prevent clogs.
• Check the float switch: Test the float switch every 6-12 months to ensure it’s functioning correctly.
• Run a cleaning cycle: Run a cleaning cycle on your dishwasher every 1-2 months to remove grease and debris.

When to Call a Professional

If you’re not comfortable with DIY repairs or if the issue persists after trying the above steps, it’s time to call a professional. Here are some signs that you need help:

• Water leakage: If you notice water leaking from the dishwasher or base pan.
• Multiple error codes: If you’re seeing multiple error codes, including E15.
• Dishwasher not draining: If the dishwasher is not draining properly or is making unusual noises.

Frequently Asked Questions

Here are some common questions and answers:

• Q: What causes the E15 error code on my Bosch dishwasher? A: The E15 error code is triggered by water accumulation in the base pan, usually due to a faulty float switch, clogged drain hose, or malfunctioning inlet valve.
• Q: Can I fix the E15 error code myself? A: Yes, you can fix the E15 error code yourself if you’re comfortable with DIY repairs and have the necessary tools. However, if you’re unsure or if the issue persists, it’s best to call a professional.
• Q: How much does it cost to replace a Bosch float switch? A: The cost of replacing a Bosch float switch can range from $20 to $50, depending on the part number and supplier.
• Q: Can I use a generic float switch replacement? A: It’s recommended to use a genuine Bosch float switch replacement to ensure compatibility and reliability.
• Q: How long does it take to replace a Bosch float switch? A: Replacing a Bosch float switch typically takes 30 minutes to 1 hour, depending on your level of expertise and the tools you have available.

For more information on Bosch dishwasher error codes, check out our guides on Bosch Dishwasher Error E09, Bosch Dishwasher Error E17, and Bosch Dishwasher Error Symptom Not Draining. If you’re experiencing issues with your LG dishwasher, visit our pages on LG Dishwasher Error E1, LG Dishwasher Error LE, and LG Dishwasher Error OE.

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