Bosch Dishwasher Error Codes Explained: What Those Letters and Numbers Really Mean

Don't Panic — Your Bosch Is Trying to Tell You Something

Bosch dishwashers are known for their quiet operation and solid reliability, which makes it all the more startling when a mysterious code suddenly appears on the display. The good news? Those codes are actually your dishwasher's way of pointing you straight to the problem. Once you know how to read them, you can often figure out whether it's a quick DIY fix or time to call in a pro.

At A to Z ApplianceCare, we see Bosch dishwashers regularly across Little Rock and the surrounding communities, and error codes are one of the most common reasons homeowners reach out. Let's break down the most frequent ones so you know exactly where you stand.

E15 — Water in the Base (Flood Protection Activated)

The E15 code means your dishwasher's flood protection sensor has detected water in the base pan. Bosch's AquaStop system kicks in and cuts off the water supply to prevent a bigger mess.

What you can try:

• Tilt the dishwasher slightly to the left (about 45 degrees) to let the water drain from the base pan — always unplug it first.
• Let the unit dry out completely for several hours, then run a test cycle.
• Check under the sink and around the door seal for obvious leaks.

When to call a pro: If E15 keeps coming back, there's an active leak somewhere — a faulty door gasket, a cracked hose, or a failing pump. That needs a hands-on inspection.

E22 — Clogged Filter

This one is almost always a maintenance issue. E22 signals that the filter at the bottom of the tub is blocked, restricting water flow and drainage.

What you can try:

• Remove the bottom rack and twist out the cylindrical filter assembly.
• Rinse it under warm running water and use a soft brush to remove grease and food debris.
• While you're in there, wipe out the filter housing area too.
• Reinstall, run a rinse cycle, and the code should clear.

This is a straightforward DIY fix for most homeowners. In Arkansas's hard water conditions, we recommend cleaning the filter at least once a month.

E24 — Drainage Issue

E24 means your dishwasher isn't draining properly. This is one of the more common codes we see, and it has a few possible culprits.

What you can try:

• Clean the filter (see E22 above) — a clogged filter can cause drainage problems too.
• Check the drain hose under the sink for kinks or clogs.
• Make sure your garbage disposal knockout plug has been removed if you recently installed a new disposal.
• Run the garbage disposal before starting a cycle to clear the drain line.

When to call a pro: If those steps don't resolve it, the drain pump itself may be failing. Replacing a dishwasher pump is a job best left to someone with the right tools and experience.

E25 — Drain Pump Blocked

Similar to E24, but E25 points more specifically to a blockage at the drain pump or pump filter rather than the drain line.

What you can try:

• Clean the main filter and check for debris around the pump cover at the bottom of the tub.
• Remove any visible obstructions like broken glass, food buildup, or labels from dishes.

When to call a pro: If you can't locate an obvious blockage or the code returns after cleaning, the pump impeller may be damaged.

E09 — Heating Element Fault

E09 indicates a problem with the heating element or the control board that operates it. Your dishes may come out cold or wet.

This is generally not a DIY repair. The heating element and related components involve electrical testing and replacement that should be handled by a qualified technician.

E01, E02, E03 — Control Board or Sensor Errors

These lower-number codes typically point to electronic or sensor failures. Start by doing a hard reset: turn the dishwasher off at the breaker for a few minutes, then turn it back on. If the code returns immediately, the control board or a connected sensor likely needs professional diagnosis.

A Quick Note on Resetting Your Bosch

Before diving deep into any error code, try a reset first. Press and hold the Start button for about 3 seconds to cancel the current cycle, then start fresh. Some minor glitches clear on their own. If the code reappears consistently, that's when it's time to troubleshoot further.

When in Doubt, Give Us a Call

Some Bosch error codes are easy wins — a filter cleaning or a kinked hose you can fix in ten minutes. Others signal something more serious that only gets worse (and more expensive) if ignored. If you're seeing a code that won't go away, or you're not comfortable digging into your appliance, the team at A to Z ApplianceCare is ready to help. Give us a call at 937-878-8271 and we'll get your Bosch dishwasher back to running quietly and efficiently — just the way it should.