Electrolux Washer Error Code H3/B3

The H3/B3 code means the washer's control board has detected that the incoming supply voltage from your home's electrical outlet is too high. The washer monitors line voltage to protect its internal electronics and will halt operation when voltage exceeds the acceptable range. This fault points to the electrical supply rather than a failed internal component. Diagnostic test 18, which checks input voltage under load, is the recommended starting point for diagnosis.

No, you should stop using the washer until the cause is identified and resolved. Sustained over-voltage can damage the control board, motor, and other internal components. A lost neutral conductor, which is one possible cause, is also a serious electrical hazard for your entire home and requires immediate professional attention.

The cost depends entirely on the root cause. If the issue is a utility grid problem, the utility provider may resolve it at no charge. Electrical outlet or wiring repairs by a licensed electrician typically range from $100 to $400 depending on the scope of work. If the control board is ultimately found to be faulty and requires replacement, parts and labor for that repair can range from $200 to $500 or more.

Some basic checks, such as measuring the outlet voltage with a multimeter, can be done by a knowledgeable homeowner. However, if the supply voltage is confirmed to be out of range, correcting the issue typically involves work on home wiring or the electrical panel, which should be performed by a licensed electrician. Do not attempt to modify electrical panel wiring or utility connections without proper qualifications.

A reset may temporarily clear the code, but the fault will return if the underlying supply voltage issue has not been corrected. Because this error reflects an external electrical condition, clearing the code without fixing the voltage problem provides no lasting resolution and leaves the appliance at risk of damage.