Bosch Dishwasher ✅ Safe for Now

Bosch Dishwasher Error Code E02

Bosch Dishwasher error code E02: Heater relay failure.

Last reviewed: Aug 7, 2026 Last updated: Aug 7, 2026

Methodology: Bosch dishwasher pages are reviewed against manufacturer support documentation and grouped by fault family before adding practical symptoms, safety notes, and repair steps.

Sources: Manufacturer fault-code sheets, service manuals, and recurring field-repair patterns.

Bosch Owner Support - Dishwasher troubleshooting and owner documentation — Official Bosch support entry point for dishwasher troubleshooting and manuals.

Limits: Guidance is informational and may not match every model-year or revision. Confirm with the official manual and diagnostics before replacing parts. For safety-critical or electrical work, use a qualified technician.

Should I unplug it?

✅ No — safe for now

Safe to use on cold settings temporarily. Heating element failure is a common DIY repair.

Can I fix it myself?

DIY Possible

Part: Heating element / thermal fuse / thermistor

How much will it cost?

DIY: $20–$100 (element or thermistor)

Technician: $100–$300

⏱ 30–60 min

What Does Error E02 Mean on Your Bosch Dishwasher?

Bosch Dishwasher error code E02: Heater relay failure.

What typically fails: Heating element / thermal fuse / thermistor

What You're Probably Seeing

→ Dishes not clean or dry
→ Water not heating
→ Long cycles

Common Causes

• Heater circuit or relay not operating correctly
• Temperature sensor reading out of range
• Low water level or circulation issue preventing proper heating

What to Try First

1 Unplug the dishwasher for 60 seconds then plug back in — this resets the control board and clears many temporary faults
2 Test the heating element with a multimeter — replace if no continuity ($20–$80 part)
3 Check the thermal fuse — a blown fuse means there was overheating, also check the vent
4 If the error persists after basic troubleshooting, contact a qualified appliance technician

🛠️ You'll need: Multimeter, Screwdriver set, Nut driver · Time: 30–60 min

💡 Try this first: Unplug the appliance for 60 seconds, then plug back in. This resets the control board and clears many temporary faults.

Questions People Also Ask

What does Bosch Dishwasher error code E02 mean? ▼

Error code E02 on a Bosch Dishwasher means: Heater relay failure. The appliance detected this condition and has stopped or limited operation to prevent further damage.

How do I fix Bosch Dishwasher error code E02? ▼

First, unplug the dishwasher for 60 seconds to reset the control board. If error E02 returns, the root cause (heater relay failure) needs to be addressed — check connections, filters, and hoses before calling a technician.

Is it safe to use my Bosch Dishwasher with error code E02? ▼

It depends on the cause. Most E02 errors mean the appliance has stopped itself as a safety measure. Check the 'Should I unplug it?' section above for specific guidance on this error.

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