Bosch Oven Error ER2

⚡ Quick Answer: The Bosch oven error code ER2 indicates a malfunction in the heating element, often resulting in the oven not heating properly. This error may be acco... ✅ DIY Fixable

What Does Error ER2 Mean?

The Bosch oven error code ER2 indicates a malfunction in the heating element, often resulting in the oven not heating properly. This error may be accompanied by an unusual buzzing sound and a continuous beeping alarm. Common causes include unstable mains power, loose wiring connections, or a malfunctioning control module. If the issue persists after resetting, further inspection is recommended.

Common Symptoms:

  • Oven does not heat
  • Continuous alarm/beeping with ER2 shown
  • Display shows ER2 upon startup or attempted operation

Possible Causes

  • Faulty or unstable mains power connection to oven (medium)
  • Loose or poor terminal connection block/wiring at oven input (medium)
  • Control module malfunction affecting power or diagnostics (low)

How to Fix Error ER2

DIY Fix Verify power and reset circuit

  1. Turn off the oven and disconnect power at the breaker or fuse box.
  2. Wait 10–30 seconds, then restore power to the oven to attempt a reset.
  3. Ensure the oven’s circuit breaker has not tripped and the supply voltage is stable.
  4. Check if ER2 clears and the oven now functions normally.

Technician Only Inspect electrical connections and oven control module

  1. Turn off power at the main breaker and lockout.
  2. Remove access panel to examine the terminal connection block where power enters the oven.
  3. Check for loose, burnt, or damaged wires and secure or replace as needed.
  4. Measure incoming voltage and continuity to ensure proper supply ranges.
  5. Test or replace the control module if power supply and wiring are verified good but ER2 persists.

Parts needed: Oven terminal connection block wiring, Control module (if needed)

🛑 When to Call a Pro:
  • If mains power supply testing indicates an unstable or unsafe supply
  • If ER2 persists after resetting and verifying external wiring
  • If technician-level inspection and diagnostics identify control module or internal wiring faults

Technical Specifications

wattage 3000W
component Heating Element
resistance 10-30 ohms
part_number 00420483
voltage_rating 240V AC

Common Questions

What does ER2 error mean on bosch oven?

ER2 indicates a heating element malfunction, causing the oven not to heat properly.

Can I fix bosch oven ER2 error myself?

Yes, you can reset the oven and check power connections.

How much does it cost to fix ER2 error?

$100–$500+ depending on parts and labor.

When should I call a technician for ER2?

Call if the error persists after troubleshooting or if there's a power supply issue.

Sources & References

Data last verified: 2026-01-16

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