Bosch Dishwasher Error E02
⚡ Quick Answer: The Bosch dishwasher error code E02 indicates a heating-related fault, often linked to a malfunction in the main control board's relay affecting the w... ⚠️ Difficulty Varies
What Does Error E02 Mean?
The Bosch dishwasher error code E02 indicates a heating-related fault, often linked to a malfunction in the main control board's relay affecting the water heater circuit. Symptoms include the E02 error displayed on the panel, inability to heat water, and interrupted wash cycles. If this error persists, it may be due to a faulty temperature sensor or issues with the control board.
Common Symptoms:
- Error E02 displayed on panel
- Dishwasher unable to heat water
- Wash cycles may be interrupted or extended
Possible Causes
- Main control board heater relay fault (medium)
- Faulty temperature sensor / thermistor affecting heating regulation (medium)
How to Fix Error E02
DIY Fix Basic checks and reset
- Turn off dishwasher and disconnect power at breaker for ~30 seconds.
- Reconnect and attempt a fresh cycle to see if E02 persists.
- Ensure dishwasher door is firmly closed and power is stable.
Technician Only Inspect and repair heating circuit components
- Disconnect power and access the dishwasher’s lower control area.
- Test temperature sensor/thermistor with multimeter to verify resistance per specifications.
- Inspect and test heater relay on control board; if faulty, replace control board or relay module.
- Check wiring harnesses for loose, burnt, or corroded connections related to heating elements and sensors.
Parts needed: Temperature sensor/thermistor, Control board/heater relay, Associated wiring harness
- If E02 persists after basic reset and visible wiring inspection
- If control board or sensor tests indicate faults requiring part replacement
- If there are signs of electrical damage (burn marks, corrosion)
Next step
Choose the next step for E02
Confirm the diagnosis before ordering. An error code can identify the system involved, but it does not prove that a specific part has failed.
Most relevant component to inspect
Temperature Sensor
Monitors the internal temperature to ensure correct operation and prevent overheating.
- Typical part-only price
- $15 - $35
- DIY difficulty
- Easy
- Estimated time
- 15-30 mins
Where can I find the model number?
Check the rating label around the door, lid, frame, rear panel, or inside the appliance cabinet. Use the complete model number, including suffixes.
Verify the complete model and part number on the retailer's compatibility page before ordering.
Other parts options
Check related components first; use model search as a fallback.
Thermistor
Measures precise temperature changes and sends resistance feedback to the control board.
Main Control Board
The central brain of the appliance that controls all components, cycles, and timings.
Wiring Harness
Connects controls, sensors, motors, and other electrical components inside the appliance.
Model-compatible Dishwasher parts
Enter the complete model number to browse compatible replacement parts. This is a model-based parts search, not a diagnosis that a specific component failed.
Affiliate disclosure: As an Amazon Associate I earn from qualifying purchases. We may earn a commission from other qualifying purchases or service requests made through links on this page, at no additional cost to you. Recommendations are based on repair relevance, not commission rate.
Optional routine care
Maintenance supplies
These products support cleaning or routine upkeep. They are separate from the possible repair components above and are not claimed to fix this error code or symptom.
Dishwasher Cleaner and Descaler
Supports routine removal of mineral scale, grease, and odor. It is maintenance, not a repair for a failed pump, valve, or control.
Braided Dishwasher Inlet Hose
For replacement of an externally damaged supply hose. Verify connection size, length, and appliance installation requirements before ordering.
Affiliate disclosure: As an Amazon Associate I earn from qualifying purchases. Recommendations are based on routine-care relevance, not commission rate.
Technical Specifications
| wattage | 50W |
|---|---|
| component | Drain Pump |
| resistance | 10-30 ohms |
| part_number | Bosch 00438762 |
| voltage_rating | 120V AC |
Common Questions
What does E02 error mean on Bosch dishwasher?
E02 indicates a heating fault, often due to a control board relay issue affecting water heating.
Can I fix Bosch dishwasher E02 error myself?
Yes, you can perform basic checks and reset the dishwasher to see if the error persists.
How much does it cost to fix E02 error?
Repair costs range from $150 to $400, depending on the required parts and labor.
When should I call a technician for E02?
Call a technician if the error remains after a reset or if there's visible damage to components.
Sources & References
Data last verified: 2026-07-25
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