Usually indicates a heat pump internal heater fault or error.
officialSource: officialLast verified: 2026-06-24Can use appliance: no
What to check first
Can I keep using it?
Electrical warning: stop and verify
Do not keep using the appliance if the code points to voltage, wiring, control power, burning smell, smoke, or a possible miswired supply.
Safe next step
Use only safe owner-level power checks, then involve a qualified technician or electrician when the source points to wiring or supply voltage.
Stop when
Breakers trip, lights dim, the appliance smells hot, wiring may be miswired, or the warning returns after a safe reset.
Safety boundaries
Safe first
Match the exact brand, appliance type, and displayed code first.
Use the model manual as the final authority for access steps.
Disconnect power before any service-access step.
Do not do this
Do not keep running the appliance while this code is active.
Do not bypass locks, float switches, leak sensors, or other safety systems.
Common causes include
Internal heater fault
Heat pump circuit issue
Appliance control or electrical fault
Basic checks
Stop using the dishwasher.
Close the water tap if the official guidance for the model says to do so.
Do not attempt internal heater repairs.
Reset or retry steps
A breaker reset may be listed by Bosch, but repeated resets are not a repair.
When to call a technician
Call Bosch support for E09 or F09.
Call a qualified technician for suspected heater or electrical faults.
FAQ
What does Bosch Dishwasher code E09 usually mean?
Usually indicates a heat pump internal heater fault or error.
Can I keep using the dishwasher with code E09?
Do not keep using the appliance until the visible issue has been checked and the relevant safety warnings have been addressed. Heater and electrical repairs are not safe DIY work.
When should I call a technician for Bosch E09?
Call Bosch support for E09 or F09. Call a qualified technician for suspected heater or electrical faults.
