Flash-On-Flash-On

The PCB has failed; contact service.

What it means

The PCB has failed; contact service.

This explanation is shared only by models whose manufacturer documents the same code, meaning, and guidance.

Read all four process lights from left to right, distinguishing off, flashing and on.
Record the pattern and contact service; do not infer a part replacement.

Manufacturer source

Select your exact model below to open its manufacturer source. Manual editions and model revisions can differ.

If there is a safety risk, stop using the appliance and follow the manufacturer’s instructions.