Bosch Dishwasher E15 Error Code: Causes & Fixes

A Bosch dishwasher showing E15 can be alarming because it usually means "water where it shouldn't be" — but in most cases it's a minor leak and a very fixable problem. E15 is part of Bosch's leak-protection system working exactly as designed: it's protecting your kitchen floor from a flood. This guide explains what E15 means, why it happens, how to clear it yourself, and when you need a professional.

What does the Bosch E15 error code mean?

E15 indicates that the dishwasher's safety switch has detected water in the base of the unit. Bosch dishwashers have a leak-protection system (often called AquaStop) that includes a base pan under the tub and a float switch sitting in that pan. If even a small amount of water leaks down into the base, the float rises, trips the switch, and the dishwasher shuts down and displays E15 — usually while running the pump continuously to try to clear the water.

In plain terms: a little water has pooled under the tub, and the dishwasher's anti-flood system has activated to keep it from getting worse.

💡 Why it's a good thing (sort of): E15 means the leak-protection system is doing its job. The code itself is easy to clear — but you should always find the source of the water, or it will simply return.

Most common causes of the E15 error

Step-by-step fixes (start here)

⚠️ Safety first: Before doing anything, turn off the water supply to the dishwasher and disconnect the power at the breaker or outlet. You'll be tilting the unit and dealing with water near electrical components — do not skip this step.

1. Drain and dry the base pan (the #1 fix)

Clearing the water that's tripping the float resets the code in most cases.

1. Turn off power and the water supply.
2. Carefully tip the dishwasher backward about 45 degrees (have a towel and shallow pan ready) so the trapped water in the base pan runs out the back/bottom. Mop it up.
3. Alternatively, remove the bottom kick plate (toe panel) with a Torx screwdriver and use towels or a sponge to soak up the water in the base.
4. Dry the base pan thoroughly, including around the white/foam float so it can drop back down.
5. Restore power and run a short cycle to see if E15 returns.

If the code is gone and doesn't come back, it may have been a one-time spill or condensation. If it returns, you have an active leak to find.

2. Perform a hard reset

If the pan is dry but the code lingers, disconnect power for at least 5 minutes, then restore it. This lets the control board re-read the (now dry) float switch.

3. Find the leak source

If E15 comes back after drying, water is still getting into the base. With the kick plate off and the machine running briefly (use caution, power on only as needed), look for drips at:

• The water inlet valve where the supply line connects — a common leak point.
• Hose connections and clamps — check for looseness or cracks.
• The sump and pump area under the tub — look for seal leaks.
• The door gasket — a worn seal can let wash water escape and run down.

Tighten any loose clamps; a frayed or cracked hose or a worn gasket should be replaced.

If the easy fixes don't work

Leaking water inlet valve

The inlet valve is one of the most frequent E15 culprits. If it drips even slightly when off, water slowly collects in the base. Replacement runs about $120–$250 with labor.

Hose, clamp, or sump leak

A cracked fill/drain hose, a loose clamp, or a degraded sump seal lets water escape during cycles. Repairs range from $80–$350 depending on the part and accessibility.

Worn door seal

A failing door gasket lets spray escape and trickle down into the base. A new gasket is typically $100–$200 installed.

Faulty float switch (false E15)

If the base is genuinely dry and stays dry but E15 keeps appearing, the float switch itself may be stuck or faulty, falsely reporting water. Replacement is about $120–$250.

How much does it cost to fix a Bosch E15 error?

• Draining and drying the base: $0 (DIY)
• Inlet valve replacement: $120–$250
• Hose/clamp repair: $80–$200
• Door gasket replacement: $100–$200
• Sump/pump seal repair: $150–$350
• Float switch replacement: $120–$250

Many E15 errors clear for free after drying the pan, but if there's an active leak, expect a parts-level repair to stop it permanently.

Does a home warranty cover a Bosch E15 repair?

Built-in dishwashers are commonly covered on home warranty appliance plans. A leaking inlet valve, hose, pump seal, or faulty float switch would typically count as a covered wear-and-tear breakdown — you'd pay just your service call fee, up to the plan's cap. Note that any water damage to your floor or cabinets from the leak falls under homeowners insurance, not the home warranty.

When to call a professional

Call a technician if:

• E15 returns after draining and drying — meaning there's an active leak to locate.
• You see active dripping, puddling, or corrosion under the unit.
• You're not comfortable tilting the dishwasher or removing the kick plate.
• The dishwasher is under manufacturer warranty (Bosch also advises contacting support for E15).

The bottom line

The Bosch E15 error is the leak-protection system telling you water has pooled in the base pan. The immediate fix is simple: cut power and water, drain and dry the base pan (and the float), then reset. If the code stays away, it was likely a one-time spill. If it returns, there's an active leak — usually a dripping inlet valve, hose, gasket, or sump seal — and an $80–$350 repair will stop it for good. Don't ignore a recurring E15: the system is protecting your floor for a reason.

Related articles

• Dishwasher Repair Cost Guide
• Whirlpool Dishwasher F2 E2 Error Code: Causes & Fixes
• Does a Home Warranty Cover a Dishwasher?
• Repair or Replace: How to Decide for Any Appliance

📌 This guide is general information for 2026 and not a substitute for your appliance manual. Error-code behavior varies by model — always check your Bosch manual, and turn off power and water before servicing.