Electrolux Dryer Error Code EH4

EH4 is a Zero Watt relay alarm indicating that the dryer's power-saving standby circuit is not being activated by the main control board. The dryer will continue to operate and dry clothes normally, but the zero Watt function is non-functional. The fault is attributed directly to a faulty main control board.

The dryer's core drying functions remain operational during an EH4 fault, so the appliance will continue to tumble and heat normally. However, the zero Watt power-saving circuit is not functioning, which means the dryer may draw more standby power than intended. It is advisable to address the board replacement in a timely manner rather than leaving the fault unresolved indefinitely.

Repair costs depend on whether you replace the main board yourself or hire a technician. The main control board part alone typically falls in the range of $100 to $250 depending on the specific model. If you use a professional repair service, expect total costs including labor to range from $200 to $400 or more.

The indicated repair for EH4 is replacement of the main control board, which is an intermediate-level repair. A knowledgeable DIYer comfortable working with appliance electronics and disconnecting power safely can perform this repair. However, if you are not confident working inside the appliance, a qualified technician is recommended.

A power reset may temporarily clear the error display, but the EH4 fault will return because the underlying cause is a hardware failure in the main control board. The zero Watt relay circuit will continue to fail to activate until the board is replaced, so resetting is not a lasting solution.