Bosch HIS8655U 800 Series 36 in Induction Cooktop Er3 Error Fix: Voltage Supply Error — Induction

Error code Er3 on the Bosch HIS8655U 800 Series 36 in Induction Cooktop means: Voltage Supply Error — Induction. The incoming voltage supply to the induction system is out of range. Induction cooktops and ranges require stable 240V AC (±10%). Voltage below 200V or above 265V will trigger this error. Check the circuit breaker panel — verify both legs of the 240V supply are present (a tripped breaker on one leg will deliver only 120V). Check the power cord and terminal block connections at the cooktop. Contact an electrician if voltage is consistently out of range.

The most successful fix is "Test and Repair Voltage Supply with Multimeter and Terminal Block Replacement" (medium difficulty, ~60 minutes). Estimated DIY cost: $10-$25. HomeMD has 2 community-ranked fixes for this error.

This error is rated high severity. You should address it promptly — continued use could cause damage or safety concerns.

Yes — the top-ranked community fix ("Test and Repair Voltage Supply with Multimeter and Terminal Block Replacement") is rated medium difficulty and takes about 60 minutes. Tools needed: T20 Torx screwdriver, Digital multimeter, Non-contact voltage tester.

DIY cost: $10-$25. Professional repair typically costs $150-$300. Many homeowners save money by trying the top-ranked community fix first.

The Bosch HIS8655U 800 Series 36 in Induction Cooktop has 5 other known error codes, including: Er1 (Induction Coil Overheated), Er2 (Power Electronics Overheated), Er4 (Incompatible Cookware Detected), Er5 (Induction Coil / Zone Fault), Flashing H (Residual Heat Warning).

Error code Er3 also appears on 2 other Bosch models: HDI8056U 800 Series 30 in Induction Slide-In Range, HII8056U 800 Series 30 in Induction Range with Home Connect. The fix may vary by model, so check each model's specific page for tailored repair steps.