How to Fix the Bosch Dishwasher E15 Error Code

The E15 error code on your Bosch dishwasher indicates water pooling in the base pan underneath the machine, usually caused by leaks from a loose door seal, a failing water inlet valve, or worn-out hoses. When this occurs, your dishwasher will shut off the water intake to prevent water damage to your home. With this guide, you'll learn how to systematically inspect these parts to clear the code.

What Does the E15 Error Code Mean on a Bosch Dishwasher?

Flashing ‘E15’ is your Bosch dishwasher’s way of telling you that it has detected water accumulating in the base pan underneath the appliance. This occurs during a leakage, as water travels down the dishwasher's double-wall hose and collects in the base pan. As water pools in the pan, it activates a safety switch, which then stops the water intake and displays the error code. This safety feature is called “AquaStop”, and it is designed to prevent water damage to your home.

What Causes the E15 Error Code on a Bosch Dishwasher?

Understanding the potential causes behind the E15 error is crucial for effective troubleshooting. Several factors can trigger this code, including:

• Leaky Seals or Gaskets: The door seal or gaskets seal the dishwasher tightly during operation. Over time, the door seal or gaskets around the dishwasher can wear out or become damaged, allowing water to escape into the base pan.
• Cracks or Damage to the Dishwasher Tub: Any physical damage to the inside of the dishwasher can lead to water leaking into the base pan.

How to Fix the E15 Error Code on a Bosch Dishwasher

Clearing the E15 error involves two main steps: getting rid of any water in the dishwasher's base and then fixing the underlying cause of the leak.

How to Hard Reset a Bosch Dishwasher to Fix the E15 Error Code

The error code can sometimes be caused by a control board glitch that could be cleared with a hard reset. To do this:

1. Disconnect your dishwasher from its power source for about five minutes. This gives the dishwasher’s internal system a chance to reset itself.
2. After waiting, turn the power back on.

If the error persists, it means there’s water in the base of the dishwasher that will need to be removed.

How to Remove Water from a Bosch Dishwasher to Fix the E15 Error Code

The base pan catches any water that may leak or spill when your dishwasher is running. It is found at the bottom of the machine, underneath the main washing compartment. To remove water from it, you will need to:

1. Begin by making sure the dishwasher is unplugged or disconnected from its power source, and that its water supply is shut off.
2. Have some towels or a container ready to catch any water that comes out from your dishwasher during this process.
3. Gently tilt the dishwasher backward at a 45-degree angle to drain out the unwanted water in the base pan.

Even though tilting the dishwasher might fix the error temporarily, you're likely to see it again if you don't find and fix the leak causing the water buildup. Be sure to inspect the dishwasher’s door seal, water inlet valve, and all hoses for any signs of leaks, as these are common sources of issues that could lead to water accumulation in the base pan again.

How to Inspect a Bosch Dishwasher Door Seal to Fix the E15 Error Code

The door seal runs along the perimeter of the dishwasher door, creating a watertight barrier to prevent water from leaking out during wash cycles. Open the door fully to expose the entire seal and carefully examine it. Look for any signs of wear or areas where the seal might have come loose. If the seal is compromised, it must be replaced. Replacement seals can be installed with a bit of patience. To remove a damaged door seal:

1. Start at one end and gently pull it away from its groove. Most seals are press-fitted and do not require tools for removal.
2. Then, clean the groove or channel where the seal sits.
3. Remove any residue, food particles, or buildup to ensure the area is clean and smooth for the new seal.
4. Take the new seal and begin to press it into place, starting at one corner and working your way around the door. Make sure the seal is evenly seated in the groove without any twists or folds.

How to Inspect a Bosch Dishwasher Water Inlet Valve to Fix the E15 Error Code

The inlet valve opens at the beginning of each wash cycle to allow water to enter your dishwasher. It then closes to stop the flow once the correct level is reached. If this valve does not close completely, it can lead to excessive water entering the dishwasher, potentially resulting in leaks. To inspect the valve:

1. Find the inlet valve at the bottom front section of your dishwasher, behind the lower kickplate or access panel. You’ll need to remove this panel with a screwdriver to reach the valve.
2. Visually examine it for any signs of wear or corrosion. This might include water marks, rust, or mineral deposits on or around the valve.

If you find yourself needing to install a new water valve, follow these steps:

1. Disconnect the electrical connectors from the existing inlet valve. Take note of how the wires were attached for reassembly.
2. Use pliers or an adjustable wrench to loosen and disconnect the water supply line from the valve. Be prepared for some water to spill out.
3. Unscrew any mounting screws holding the existing valve in place. Once freed, remove it.
4. Position the new valve and secure it with screws.
5. Reattach the water supply line and electrical connectors, ensuring a snug and secure fit.

How to Inspect a Bosch Dishwasher Hose to Fix the E15 Error Code

The supply line hose brings fresh water into the dishwasher, while the drain hose carries wastewater away. Generally, you can find the supply hose attached to the water inlet valve at the bottom of the dishwasher, often accessible from the front lower panel. The drain hose usually runs from the dishwasher pump to the sink drain or garbage disposal.

Inspect the hoses for any signs of wear. Connections should be tight and secure to prevent water from escaping. If you discover damage on them, purchasing replacement hoses is necessary. To replace a hose:

1. Loosen the clamps or fittings securing the hose to the dishwasher and to the water supply or drain.
2. Route the new hose similarly to the old one, connecting it to the appropriate points on the dishwasher and the water supply or drainage system.
3. Secure all connections with clamps or fittings.

How to Reset the Bosch Dishwasher Safety Switch to Fix the E15 Error Code

The safety switch monitors the water levels in the dishwasher's base. It works in conjunction with a polystyrene or Styrofoam disk that floats upwards as water accumulates. If the water level becomes too high, the floating disk activates the safety switch, which signals the dishwasher to display the error. The safety switch is located at the bottom of the dishwasher. To access the switch:

1. Remove the outer door panel and the dishwasher’s kickplate. The type of screwdriver needed (T20 or T15 Torx, or a Phillips-head) for this step depends on your dishwasher model.
2. Once removed, the safety switch should be visible in the center of the machine. Twist and pull the safety switch to release it from its position.
3. Carefully lift out the disk. This is the perfect opportunity to inspect it for damage and to clean the area beneath it.
4. After cleaning and drying the components and the basin, reposition the disk and securely reattach the safety switch.
5. Ensure there are no obstructions and that the disk can move freely.

Keeping up with routine maintenance can help avoid E15 error codes in the future. If these solutions don't resolve the issue, it might be time to call in an expert or reach out to Bosch’s customer support for advice. For more DIY tips and tricks to keep your home running smoothly, don’t forget to browse through our other home improvement guides.