Electrolux Dryer Error Code B3

The B3 code on an Electrolux dryer means the control board has detected that the incoming power supply voltage is too low, falling outside the acceptable amplitude range. The dryer displays this fault to prevent operation under conditions that could damage components or cause poor performance. The fault points to either an external power supply problem or a failure of the main control board's voltage-sensing circuitry.

Start by checking the voltage at the wall outlet and at the dryer's terminal block using a multimeter, confirming both legs of the 240V supply are present and within range. Inspect the terminal block connections inside the dryer for looseness or corrosion and tighten any that need attention. If supply voltage is correct throughout, the main control board is likely the faulty component and will need to be replaced.

Repair costs vary depending on the root cause. If the fix involves tightening connections or replacing the wall outlet, costs are typically in the range of $50 to $150 including a service call. If a main control board replacement is needed, parts and labor combined can range from $200 to $450 or more depending on the specific model and local labor rates. Having an electrician evaluate the home circuit, if needed, may add additional cost.

Resetting the dryer by disconnecting power for a few minutes may temporarily clear the B3 code, but the fault will return if the underlying cause is not corrected. If the low-voltage condition is intermittent, such as from a loose connection or fluctuating supply, the code may reappear with the next cycle. A permanent fix requires identifying and correcting the root cause in the power supply circuit or the main board.

You should not attempt to continue operating the dryer while the B3 code is active. Running an appliance on insufficient voltage can overstress electrical components, cause overheating, and lead to further damage. Address the power supply issue or board fault before resuming use.