I disassembled it and it appears to be a 120v/20A relay on the electronics board behind behind the front cover. Below is a video:
Warming the relay with a hot-air gun made it click much more frequently; blowing cool air across it stopped the clicking completely. So, assuming I can order/pickup a single $1 relay locally, it looks like this will be a quick 5 minute fix with the soldering iron. The other possibility is a major power draw downstream, i.e. the pump or heating element but I hope not. I'd be interested in hearing everyone else's opinion.
Inopportune timing on this as I have guests arriving for a week on Sunday. I have a used, commercial dishwasher waiting in the shed but wanted to wait until I reno the kitchen done before I install it as it requires some plumbing revisions and 240v/30A wiring.
Edited by GrahamW, 26 October 2012 - 08:59 PM.