Bosch Cooktop Error Code ER 22

ER 22 indicates a keyboard error detected by the mTwist control system, which manages the touch control interface on your Bosch cooktop. The system has identified a problem with the keypad input, such as a stuck key, a failed touch sensor, or a communication fault between the keypad and the control board. The cooktop stops normal operation when this code appears to prevent unintended activation of the heating elements.

A power reset by switching off the circuit breaker for 30 to 60 seconds may temporarily clear the ER 22 code if the fault was caused by a transient issue like a momentary moisture contact. However, if the underlying cause, such as a failed touch sensor, damaged ribbon cable, or faulty control board, has not been resolved, the error will return. A reset alone is not a fix, just a diagnostic step.

Repair costs depend on the root cause. If cleaning resolves the issue, the cost is minimal. Ribbon cable replacement or keypad assembly replacement typically falls in the range of $80 to $250 in parts, plus labor if a technician is involved. Control board replacement is generally the most expensive repair, with parts and labor potentially ranging from $200 to $500 or more depending on the specific model.

In some cases, yes. Start by turning off the cooktop, wiping the entire control surface clean with a dry cloth to remove any moisture or residue, and then restoring power. If the error persists, further diagnosis involves inspecting the ribbon cable and keypad assembly, which requires accessing the interior of the unit and is better suited for technicians with appliance repair experience. Internal component replacement, such as the keypad or control board, is generally not a simple DIY repair.

No. The ER 22 code indicates the control system cannot reliably read keyboard input, which means the cooktop cannot safely process user commands. Operating the unit in this state could lead to unintended heating behavior. The cooktop should remain off until the fault is diagnosed and repaired.