Electrolux Dryer Error Code 0xB4

The 0xB4 code indicates a Zero Watt Relay Error, meaning the dryer's control board detected an unexpected zero-watt condition through its power relay circuit. This points to a problem with the home's line connections at the terminal block, the wiring harness, or the main control board itself. The dryer will not operate normally until the fault is diagnosed and corrected.

No, you should not attempt to operate the dryer with this error present. A Zero Watt Relay Error can indicate a wiring problem that poses a risk of arcing, overheating, or component damage. Disconnect the dryer from power and have the wiring and control board inspected before resuming use.

If the fix is simply tightening or correcting the terminal block wiring, the cost may be limited to a service call fee, typically in the range of $75 to $150. If the main control board requires replacement, parts and labor combined generally fall between $200 and $400 depending on the specific model and local labor rates. Getting a diagnostic quote before authorizing board replacement is advisable.

Start by inspecting the terminal block inside the dryer where the power cord connects, confirming that L1, Neutral, and L2 are wired to the correct terminals and that all connections are tight and free of corrosion. If the wiring is correct and secure, check the harness between the terminal block and the main board for continuity and damage. If both checks pass, the main control board is likely defective and will need to be replaced.

A power reset may temporarily clear the code from the display, but the error will return if the underlying cause has not been corrected. The fault condition involving the relay circuit or wiring must be physically resolved for the code to stay cleared. A reset alone is not a repair.