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Bosch Dishwasher Error Code E09

Reviewed by the ApplianceErrors Editorial Team · Verified against manufacturer service documentation · Last verified: June 10, 2026
⚠ High Severity 🔧🔧🔧 Advanced DIY

Heating circuit failure — heater not functioning

The most common cause of the E09 error on a Bosch dishwasher is heater relay failure on main PCB (~55% of cases); start with: test heating element first.

💰 DIY cost: $0–$350 👨‍🔧 Pro cost: $250–$480 Save $250+ by doing it yourself
Bosch Dishwasher error code E09 on the display panel
How the E09 code appears on a Bosch dishwasher display

What Does Error Code E09 Mean on a Bosch Dishwasher?

Heating circuit failure — heater not functioning.

E09 fires when the control board commands the heating circuit but detects no expected electrical response through the heater path — typically a stuck or failed heater relay on the main PCB, or burned wiring feeding the element. Unlike E01, which points more directly at the heating element or its sensing, E09 flags the switching and control side of the circuit. The board sees the heater failing to energize or draw current, so water and drying stay cold.

Models affected: Bosch dishwashers with an integrated flow-through heater and PCB-based heater control, including models such as SHEM63W55N, SHPM65Z55N, SHXM4AY55N, SHEM3AY55N, SHP878ZD5N, and SHX878ZD5N
What owners report: Owners commonly report cold or spotty dishes, poor drying, and cycles that seem to run but never heat, with E09 appearing mid- or end-cycle. Because a good element can be blamed unfairly, many find it worth ohm-testing the element first; a burned wire or relay is often the real culprit.

What Causes Error Code E09?

Here are the most common causes in order of frequency. Start with the most likely cause before moving to the next:

  1. 1
    Heater relay failure on main PCB 55% of cases
  2. 2
    Burned wiring to heating element 25% of cases
  3. 3
    Heating element failure (secondary diagnosis) 20% of cases

How to Fix Bosch Dishwasher Error Code E09

🔧🔧🔧 Advanced DIY Est. time: 1–3 hours
⚡ Safety first: Unplug the appliance before opening any panels or touching internal components.
  1. 1

    Test heating element first

    Rule out element failure before replacing the board.

    🔩 Multimeter
  2. 2

    Check wiring to heater

    Inspect element wiring for burn marks or melted insulation.

  3. 3

    Replace control board or relay

    If element is good, the PCB heater control circuit has failed.

    🔩 Bosch control board ($150–$350)

How to Reset Error Code E09

After repair, restart on a short test cycle.

Note: If the error returns after resetting, the underlying issue has not been resolved. Work through the fix steps above.

Full Bosch dishwasher reset guide → Enter diagnostic mode →

Did this guide fix your appliance?

When to Call a Professional

Control board replacement is complex. Professional diagnosis recommended to confirm it's the board and not a wiring issue.

Average professional repair cost for this issue: $250–$480

Related Error Codes

E01
Heating element or NTC sensor failure — water not heating
⚠ High Severity

Same Code on Other Brands

Error code E09 appears on these other brands too. See every brand that shows E09 →

Samsung logo
Samsung Oven E-09
Oven temperature sensor short circuit

Find Replacement Parts

Use these links to find the exact replacement parts for your Bosch Dishwasher:

🔩
Search PartSelect
Bosch Dishwasher repair parts
🔧
Search RepairClinic
Step-by-step video guides

External links — ApplianceErrors.com is not affiliated with these retailers.

More Bosch Dishwasher Error Codes

E15 Leak protection activated — water detected in base tray E24 Drain blocked — dishwasher not draining E25 Drain pump or filter blocked — drain impeller obstructed E05 Water shortage — insufficient water entering dishwasher E22 Residual water in the sump — filter or impeller area blocked E04 Water flow sensor fault — fill volume not being measured

Frequently Asked Questions

Can I keep using my Bosch Dishwasher when error E09 appears? +
It is not advisable. The dishwasher may still power on, but running it while E09 is active can worsen the heating fault or damage related parts. Treat it as a soon-as-possible repair.
What most commonly causes E09 on a Bosch Dishwasher? +
Across reported Bosch dishwasher repairs, the most frequent is heater relay failure on main PCB (55% of cases), burned wiring to heating element (25%), then heating element failure (secondary diagnosis) (20%). Check them in that order before replacing any parts.
E09 keeps coming back after a reset — what should I check next? +
A reset only clears the stored E09 fault; if it returns, the heating problem is still present. Move on to the physical checks — test heating element first, then check wiring to heater — since the code will reappear until the root cause is resolved. This is an advanced repair involving deeper disassembly or electrical testing.
How much does it cost to fix Bosch Dishwasher error E09? +
A DIY repair typically runs $0–$350 in parts, versus $250–$480 for a professional service call, so handling it yourself saves around $250. Expect the work to take 1–3 hours.
Which Bosch Dishwasher models show error E09? +
E09 is documented on Bosch dishwashers with an integrated flow-through heater and PCB-based heater control, including models such as SHEM63W55N, SHPM65Z55N, SHXM4AY55N, SHEM3AY55N, SHP878ZD5N, and SHX878ZD5N. Other units sharing the same control platform can display it too, so the fixes here generally transfer across the series.

Sources & References

Content verified against manufacturer service documentation. Last verified: June 10, 2026.

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