- Appliances
- Bosch
- Dishwashers
Bosch dishwasher E09: heat pump heater fault
Risk level
High
Professional inspection is recommended.
Urgency
High
Quick answer
E09 identifies an internal heater fault in the dishwasher heat pump. A single 30-second power reset is the only supported user action before service.
Safety first
Safe checks you can perform
- Reset power once
Leave these tasks to a qualified professional
- Do not attempt this professional task: Diagnose the heat-pump heater circuit
Where this code applies
A code is meaningful only inside the right product and version context.
Primary scope
- System
- Appliances
- Brand
- Bosch
- Product type
- Dishwashers
Known code variants
- E-09
- Bosch E09
What it means
Bosch describes E09 as an internal heat-pump heater fault. Internal inspection or part replacement is reserved for a qualified technician.
Warnings and stop conditions
- Highsource verified
Do not remove panels or attempt to replace the heat-pump heater without qualified service.
Evidence: Bosch USA dishwasher error codes
Symptoms and causes
Probable causes · in order
- Internal heat-pump heater faultConfirmed
Bosch identifies the failed area but does not provide a user repair procedure.
Evidence: Bosch USA dishwasher error codes
Safe checks, step by step
- 1
Reset power once
No special tools
Turn the dishwasher circuit breaker off for 30 seconds then restore power. If E09 returns stop troubleshooting.
Do not open the appliance or access the heat pump.
Evidence: Bosch USA dishwasher error codes
Virtual technician
Does E09 still appear after these checks?
Answer a few questions to narrow down the likely cause and the safest next action. Guidance only - it never replaces a professional.
For professionals only
- Diagnose the heat-pump heater circuitverified
A qualified Bosch technician should diagnose and repair the internal heater fault.
Why: Bosch directs the user to support when the 30-second reset does not resolve E09.
Evidence: Bosch USA dishwasher error codes
Sources and technical references
- 1
Bosch USA dishwasher error codes
Bosch · official_doc
Was this entry useful?