Bosch Oven Error Code E005 — Protective Relay Failure
What this means
Error E005 indicates the protective relay on the control board is not functioning. This relay acts as a safety switch to cut power to heating elements if a fault is detected. When this relay fails, the oven may not heat at all as the safety system prevents operation.
Step-by-step fix
3 stepsPower cycle the oven
Turn off the circuit breaker for 5 minutes and restore power. This often resolves temporary relay faults.
E005 frequently clears with a simple power cycle.
Run a test cycle
Set the oven to 350°F and verify it heats properly after the reset.
Check power supply
Verify the oven is receiving the correct voltage (240V for electric, 120V for gas igniter). Low voltage can cause relay issues.
When to call a professional
If the error persists after power cycling, the control board relay may need professional replacement.
Information compiled from manufacturer service manuals, official troubleshooting documentation, and appliance repair industry resources. This guide is for informational purposes only — always consult a qualified technician for complex repairs.
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