Want a regional phone & address? Pick your area.
Bosch·Dishwasherhigh severity
Bosch Error Code E02
Control board relay error
Common Causes
- 1Relay failure on control board
- 2Board component fault
- 3Power surge damage
Step-by-Step Troubleshooting
- 1
Power cycle the unit — unplug for 10 minutes
- 2
Check incoming voltage at board (120VAC +/- 10%)
- 3
Inspect relay solder joints on main PCB for cracks
- 4
Test relay coil continuity (expect 50-200 ohms)
- 5
If E02 persists after board replacement, check door switch circuit
Pro Diagnostic Tip
E02 and E03 share the same relay bank. E03 specifically indicates the heater relay — if both codes appear together, the board is the definitive failure point, not individual components.
You Might Also Notice
- •Unit dead after power outage
- •Random mid-cycle shutdowns
- •Display flickers then goes blank
Parts, Cost & Difficulty
Repair Difficulty
Hard — Advanced Skills RequiredEstimated Repair Cost
$300–$500
Parts + labor. Free diagnosis with repair.
Parts That May Need Replacement
12-005-668-001 (main control board)BSH0000668 (board assembly, Thermador variant)
Do You Have the Right Tools?
Bearing puller set ($120), drum spider wrench ($85), multimeter ($85), and diagnostic software. Our technician arrives with $15K+ in professional tools — your diagnostic is free.
Licensed & Insured · 90-Day Warranty · Same-Day Service
Safety First — Know the Risks
High-voltage components and pressurized water lines create flood and shock risk. A single loose fitting can cause thousands in water damage. Our techs are licensed and insured — let them handle the risk.
Licensed & Insured · 90-Day Warranty · Same-Day Service
Get Professional Help Now
Error code E02 is a high-severity issue that can cause further damage to your dishwasher if left unresolved. A licensed technician can diagnose and fix it the same day.
Licensed & Insured · 90-Day Warranty · Same-Day Appointments Available
4.85 (232 verified reviews)
Same-Day Appliance Repair
Fixed or It's Free
$89 → $0 Service Call & Diagnosis — offer ends May 31
Frequently Asked Questions
What does Bosch error code E02 mean?
Bosch error code E02 indicates: Control board relay error. This is a high-severity issue affecting your dishwasher.
How do I fix Bosch error code E02?
Power cycle the unit — unplug for 10 minutes Then, Check incoming voltage at board (120VAC +/- 10%) Then, Inspect relay solder joints on main PCB for cracks There are 2 more steps — see the full troubleshooting guide above. This repair typically requires professional tools and expertise.
How do I know if my dishwasher has error E02?
Besides the error code on the display, common signs include: Unit dead after power outage; Random mid-cycle shutdowns; Display flickers then goes blank. If you notice any of these symptoms, check your dishwasher's display panel for error code E02.
How much does it cost to fix Bosch E02?
Repair costs for Bosch E02 typically range from $300 to $500 depending on the specific cause and parts needed. EasyBear offers free diagnosis when you proceed with the repair. Call (415) 795-7300 for a same-day appointment.