The Bosch dishwasher E15 error code means that water has accumulated in the bottom base pan, triggering the machine’s leak protection float switch. To clear the code, you must drain or dry the water out of this hidden lower compartment so the safety float can reset.
⚠️ SAFETY FIRST: Before touching anything, absolutely ensure you unplug the dishwasher from the electrical outlet or flip the circuit breaker. You must also turn off the water supply valve under the sink to prevent further flooding or electric shock.
What Causes the Bosch dishwasher E15 Error Code?
When the styrofoam float switch in the base pan lifts due to standing water, it activates the AquaStop system to halt the wash cycle and flash E15. The most frequent culprits behind this water accumulation include:
- Excessive sudsing: Using regular dish soap or too much rinse aid creates overflowing suds that seep down into the base pan.
- Clogged drainage filters: A severely blocked interior filter prevents water from draining properly, causing it to back up and spill over the tub’s edges.
- Worn or dirty door seals: Debris or tears on the rubber door gasket can allow water to slowly drip down the front of the machine into the lower tray.
- Internal plumbing leaks: A cracked wash arm, loose hose clamp, or a leaking water inlet valve can steadily drip water directly into the base over time.
How to Fix Bosch dishwasher E15 Error Step-by-Step
Follow these actionable steps to clear the standing water and reset the anti-flood sensor. You will need a flashlight, some absorbent towels or a sponge, and possibly a Torx or Phillips screwdriver.
- Remove the kick panel: Take off the bottom front access panel below the dishwasher door. You may need a screwdriver to remove the two screws holding it in place.
- Locate the base pan: Shine your flashlight underneath the tub to find the white plastic base pan and the round, styrofoam float switch.
- Soak up the water: Reach in with a highly absorbent sponge or towel to mop up all the water sitting in the pan. The goal is to get the plastic tray completely bone dry.
- The “tilt” alternative: If you cannot reach the base pan from the front, carefully pull the dishwasher out from the cabinet. Tilt the entire unit backward at a 45-degree angle to let the trapped water pour out onto a towel placed behind it.
- Reset the float switch: Ensure the styrofoam float is resting completely flat against the bottom of the dry pan. If it is stuck in the raised position, gently push it down with your finger.
- Test for the leak source: Reconnect the power and water, then run a short rinse cycle while leaving the bottom panel off. Watch closely with your flashlight to see if you can spot where the water is dripping from.
How to Reset a Bosch Dishwasher (Soft Reset)
Once the base pan is completely dry and the float switch is lowered, you need to clear the error code from the computer.
Simply press and hold the Start button for 3 to 5 seconds. The digital display should change to show “0:01” or “0:00”.
Close the dishwasher door and wait about one minute for the drain pump to finish running its cycle. Once the pump goes quiet, turn the dishwasher off and then back on to resume normal operation.
When to call a professional?
If you dry out the base pan but the E15 error returns immediately, or if you spot a steady, heavy drip coming from the motor pump or internal hoses during your test run, it is time to call for help. A recurring E15 code usually points to a compromised internal seal, a cracked tub, or a faulty control board. Contact a certified local appliance technician to safely diagnose and replace the failing components.