All Bosch Dishwasher Error Codes — Complete Troubleshooting Guide (2026)
This is the Bosch dishwasher code list we actually publish — 11 guides. Start with flood / leak codes (they look like “electronics” and are usually water in the base), then heat and drain. A code is a symptom class, not a SKU.
Detailed Error Code Guides
Error E01: Bosch Dishwasher error code E01 indicates a problem with the heater relay on the main control board. This error occurs when the control board fails to send the correct signal to the heater, resulting in an inability to heat the water properly.
Fix Bosch Dishwasher error code E01. Step-by-step guide to diagnose and resolve the heater relay on main control failed on Bosch dishwashers.
- Step 1: Reset the Main Control Board
- Step 2: Check the Heater Relay for Proper Function
- Step 3: Check the Power Supply to the Heater Relay
- ...see all 5 steps →
Tools needed: Multimeter, Phillips, Torx T20 screwdriver, Wire connectors (for testing)
Read full troubleshooting guide →Error E09: Bosch Dishwasher error code E09 indicates a heating element or temperature‑sensor failure. The control board detects an abnormal temperature reading during the heating cycle, which can be caused by a broken heating element, a faulty NTC thermistor in the sump, wiring issues, or outdated firmware.
Fix Bosch Dishwasher error code E09. Step-by-step guide to diagnose and resolve the heating element or temperature sensor failure on Bosch dishwashers, updated for 2026.
- Step 1 – Power Reset
- Step 2 – Hot‑Fill Non‑Invasive Test
- Step 3 – Visual Inspection of the Heating Element
- ...see all 10 steps →
Tools needed: Phillips, T20 Torx screwdriver, Digital multimeter (≥200 Ω range), USB‑C flash drive (minimum 8 GB, FAT32), Safety gloves and goggles
Read full troubleshooting guide →Error E12: Bosch Dishwasher error code E12 indicates a problem with the heating element due to scale or lime buildup. This error can cause your dishwasher to stop working properly, leaving your dishes dirty and unsanitary. Regular cleaning and maintenance can help prevent this issue.
Fix Bosch Dishwasher error code E12. Step-by-step guide to diagnose and resolve the scale/lime buildup on heating element on Bosch dishwashers.
- Reset the Dishwasher
- Check the Heating Element
- Clean the Heating Element
- ...see all 6 steps →
Tools needed: Phillips #2 screwdriver, T20 Torx screwdriver, Multimeter, Safety glasses
Read full troubleshooting guide →Error E14: Error code E14 on your Bosch Dishwasher indicates a flow sensor error. This means the dishwasher is not detecting water flow, which prevents it from completing the wash cycle. You may see a flashing error light or an error message on the display.
Fix Bosch Dishwasher error code E14. Step-by-step guide to diagnose and resolve the flow sensor error on Bosch dishwashers.
- Step 1: Reset the Dishwasher
- Step 2: Check the Water Supply
- Step 3: Inspect the Flow Sensor
- ...see all 6 steps →
Tools needed: Multimeter, Torx T20 screwdriver, Phillips
Read full troubleshooting guide →Error E15: E15 means the dishwasher detected water (or a closed float) in the base pan under the tub. It is a flood-protection response—not a “random electronics” code. Something leaked, overflowed, or the float is stuck/faulty.
Bosch E15 means water hit the base pan sensor. Dry the pan, find the leak, test the float switch (e.g. 00631199 family), and fix inlet valve or hose issues without guessing.
- Step 1: Power off and dry the base pan completely
- Step 2: Free and test the float switch
- Step 3: Find the real leak (inlet, sump, door, hoses)
- ...see all 5 steps →
Tools needed: Towels and shallow pan, Flashlight, Torx T20, Phillips screwdriver, Multimeter (continuity), Shop vacuum (wet) optional
Read full troubleshooting guide →Error E15-parts: Parts-focused companion to E15 (water in base). This page prioritizes the components that actually clear E15 after the pan is dried and the leak source is identified.
Which Bosch E15 parts to buy first: float switch (00631199 family), inlet valve, and drain hose—with test order, typical prices, and model matching tips.
- Step 1: Dry pan + prove you need a part
- Step 2: Float switch replacement (most common electrical false trip)
- Step 3: Inlet valve when you see a drip under the sink or into the chassis
- ...see all 5 steps →
Tools needed: Torx T20, Phillips, Multimeter, Towels, Flashlight, Pliers for hose clamps
Read full troubleshooting guide →Error E17: Bosch Dishwasher error code E17 indicates that the dishwasher has detected excessive water. This error means that the water level in the tub is too high, which can cause the dishwasher to malfunction or even leak.
Fix Bosch Dishwasher error code E17. Step-by-step guide to diagnose and resolve the overfill on Bosch dishwashers.
- Reset the Dishwasher
- Check the Water Level Sensor
- Inspect the Float Switch Assembly
- ...see all 5 steps →
Tools needed: Phillips #2 screwdriver, Torx T20 screwdriver, Multimeter
Read full troubleshooting guide →Error E22: Error code E22 on your Bosch Dishwasher indicates that the filter or drain is clogged, preventing water from draining properly. This can cause poor cleaning performance, unusual noises during the cycle, and potentially damage your dishwasher.
Fix Bosch Dishwasher error code E22. Step-by-step guide to diagnose and resolve the filter/drain clogged on Bosch dishwashers.
- Step 1: Power Cycle the Dishwasher
- Step 2: Check and Clean the Filter
- Step 3: Inspect and Clean the Drain
- ...see all 5 steps →
Tools needed: Phillips, Torx T20 screwdriver, Multimeter, Drain snake (optional)
Read full troubleshooting guide →Error E24: Error code E24 on your Bosch Dishwasher indicates that the drain hose is kinked or clogged. This prevents the dishwasher from draining properly, causing water to accumulate inside the dishwasher. If left unchecked, this can lead to water damage, mold growth, and unpleasant odors.
Fix Bosch Dishwasher error code E24. Step-by-step guide to diagnose and resolve the drain hose kinked or clogged on Bosch dishwashers.
- Step 1: Check the drain hose for kinks or blockages
- Step 2: Check the drain filter for blockages
- Step 3: Check the dishwasher's drain pump for blockages
- ...see all 5 steps →
Tools needed: Multimeter, Phillips, T20 Torx screwdriver, Drain snake (optional)
Read full troubleshooting guide →Error E25: Bosch Dishwasher error code E25 indicates that the drain pump impeller is blocked, causing water to accumulate in the dishwasher. This can lead to poor washing performance, increased energy consumption, and potentially damage the appliance's internal components. If left unchecked, a blocked drain pump impeller can cause the dishwasher to overheat, resulting in costly repairs.
Fix Bosch Dishwasher error code E25. Step-by-step guide to diagnose and resolve the drain pump impeller blocked on Bosch dishwashers.
- Reset and Power Cycle
- Check the Drain Pump Impeller
- Clear Blockages
- ...see all 5 steps →
Tools needed: Phillips, Torx T20 screwdriver, Multimeter, Drain snake (optional)
Read full troubleshooting guide →Error SYMPTOM‑NOT‑DRAINING: The SYMPTOM‑NOT‑DRAINING code appears when the control board detects water left in the tub after the drain cycle. It means the dishwasher cannot pump out water fast enough, which can leave dishes soggy and may cause leaks if the problem persists.
Fix Bosch Dishwasher SYMPTOM‑NOT‑DRAINING error. Step‑by‑step guide to diagnose and resolve drainage problems.
- Power reset – the 60‑second check
- Inspect the drain hose for kinks or blockage
- Check the drain pump and impeller
- ...see all 9 steps →
Tools needed: Phillips #2 screwdriver, T20 Torx screwdriver, Multimeter with continuity test function, Bowl of warm water, Flashlight
Read full troubleshooting guide →Common Bosch Dishwasher Problems
Beyond specific error codes, Bosch Dishwasher owners frequently encounter these issues:
- Error codes that keep coming back — Usually indicates the root cause wasn't fully addressed. Follow our complete repair guides above.
- Multiple error codes at once — Often points to a control board issue or power supply problem. Check our individual guides for related codes.
- Error code not listed here — Contact Bosch support directly or check your owner's manual. We update this guide as new codes are discovered.
What techs actually see on Bosch Dishwashers
- Wet base pans that look like control failures (Bosch E15, Whirlpool leak/F2 family).
- Chopped food in the filter presented as a “bad pump.”
- High-loop / air-gap missing on a remodel install.
When to Call a Professional
While many Bosch Dishwasher error codes can be resolved with basic troubleshooting, call a certified technician if:
- The error persists after following all troubleshooting steps
- You see signs of electrical damage, burning smells, or water leaks
- The repair requires specialized tools or involves gas/electrical connections
- Your appliance is still under warranty — DIY repairs may void coverage