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

  1. Turn off dishwasher and disconnect power at breaker for ~30 seconds.
  2. Reconnect and attempt a fresh cycle to see if E02 persists.
  3. Ensure dishwasher door is firmly closed and power is stable.

Technician Only Inspect and repair heating circuit components

  1. Disconnect power and access the dishwasher’s lower control area.
  2. Test temperature sensor/thermistor with multimeter to verify resistance per specifications.
  3. Inspect and test heater relay on control board; if faulty, replace control board or relay module.
  4. 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

🛑 When to Call a Pro:
  • 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)

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: 2026-01-16

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