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Bosch Dishwasher E09 Error Code
Heating fault (meaning varies by region). Here is what it means and how to clear it, easiest fix first.
E09 points to a heating problem, but Bosch describes it differently by region. Bosch US lists it as a fault in the heat pump's built-in heater, while Bosch UK says the heating element is defective.
US: E09 = heat pump internal heater fault; newer US models show E2030 or E6001, and Bosch US gives E20 the same description. UK/EU: E09 = heating element defective; Bosch UK notes that if the salt light is also on, a dirty salt sensor can be involved. Some regions show it as F09. Check your manual for your model.
How to fix Bosch E09
Reset the dishwasher at the breaker
Switch off the dishwasher's circuit breaker, wait about 30 seconds, then switch it back on. Run a short cycle with the dishwasher empty and watch whether the same code comes back. A code that clears and stays away was likely a one-time glitch.
Check the salt sensor (UK and EU models)
If the salt light is on along with E09, top up the dishwasher salt and make sure the salt reservoir area is clean. Bosch UK notes a dirty salt sensor can wrongly report that salt is needed.
Turn off water and power if it returns
If E09 comes back, close the water supply and switch the dishwasher off at the breaker until a technician has looked at it. Bosch advises against repairing heating faults yourself.
When to call a technician
Book a Bosch engineer or qualified technician. Heater and heat pump repairs involve live electrical parts and are not a DIY job.
Parts that commonly cause E09
- Heat pump (circulation pump with heater)
- Heating element
Order parts by your exact model number so they fit.
Other Bosch dishwasher codes
- E15Water detected in the base (leak protection)
- E24Dishwasher is not draining (blocked drain path)
- E25Drain pump blocked or pump cover loose
- E22Filter is blocked
- E23Drain pump fault
- E16 / E17Water can't enter the dishwasher
- E18Water level too low
- E14Flow meter or filling problem
- E27Household power supply too low
- E12Limescale buildup in the heat pump
- E21Heat pump blocked
- E01-E05Control board or electronics fault
- E06Door sensor circuit fault
- E19Detergent dispenser fault
- E07 / E10CrystalDry (zeolite) drying fault
- H01Delay start is set (not an error)
Frequently asked questions
What does E09 mean on a Bosch dishwasher?
E09 points to a heating problem, but Bosch describes it differently by region. Bosch US lists it as a fault in the heat pump's built-in heater, while Bosch UK says the heating element is defective.
Can I fix Bosch E09 myself?
Only the basic checks. You can safely try the steps above, but E09 usually points to a part or fault that needs a technician.
What if E09 keeps coming back?
A code that returns after a reset and the checks above usually means a part is wearing out. Note when E09 appears (which cycle, how often) and have your model number ready; it helps a technician bring the right part on the first visit.
Last reviewed 2026-10-19. Codes and steps can vary by model; check your owner's manual.