A friend dropped me this Cabrio gas dryer off to check out. Original complaint was: dead. A previous tech threw parts at it and condemned it under warranty. Owner has since negotiated with Whirlpool and replaced it. He liked the Cabrio better than what he has now and wants to see if it can be revived.
The unit has a tech sheet in it, but I can't find the service manual online. The UI was unresponsive, so I popped off the console. It looks like previous tech swapped out the ACU for a number that won't look up. The ACU in the unit is W11400350. With the UI disconnected, the ACU LED has a slow, steady heartbeat, flashing constantly. Once the UI data connector is attached, the UI does some random flashing of lights, short beeping, then the led on the ACU changes to rapid flashes with pauses in between.
Initial voltage testing with the UI disconnected shows line voltage ok, 12vdc ok, and 12vdc on the UI data connector. The tech sheet says it should be 5vdc.