Bosch Range Error Code ER3

ER3 on a Bosch range indicates a fault in the electric cooktop MTwisT control system's key selection process. The control module has detected that one or more touch or input zones are not registering correctly. This can be caused by contamination on the panel surface, a stuck key, or a failure within the control electronics.

A reset by cutting power at the breaker may temporarily clear the code, but if the underlying cause such as contamination, a damaged panel, or a faulty control board is not addressed, the ER3 fault will return. A reset alone is not a fix but can help determine whether the issue is intermittent.

Repair costs depend on the root cause. If the issue is resolved by cleaning the control surface, there is no parts cost. If the control panel overlay needs replacement, parts and labor typically range from $150 to $350. A full control board replacement can bring total repair costs to between $250 and $500 or more, depending on parts availability and local labor rates.

In some cases, yes. Start by powering the range off at the breaker for a few minutes, then cleaning the control panel surface thoroughly to remove any moisture or residue. If the error returns after the cooktop is powered back on, the fault is likely hardware-related and a technician should inspect the control board and panel.

It is generally not advisable to continue using the cooktop when ER3 is active, as the key selection fault means the controls may not respond reliably or accurately. Operating the appliance with a known control system fault could lead to unintended behavior. The range should be inspected and repaired before further use.