Bosch Dishwasher Error Code E09

What Does Error Code E09 Mean on a Bosch Dishwasher?

Heating circuit failure — heater not functioning.

The heating circuit has an electrical fault. Similar to E01 but specifically indicates a relay or circuit board issue rather than the element itself.

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

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

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

When to Call a Professional

Related Error Codes

Same Code on Other Brands

Error code E09 appears on these other brands too. Click to compare:

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:

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

Frequently Asked Questions