Close up of the circulation timer.  Twice an hour (about every 30 mins) the timer kicks in and runs the two circulation fans for about 20 seconds or so.  Power from here pops the two relays below it to power them up.

As a big note here - I got ripped on my first attempt at ordering a circuit board.  Avoid MONTEK ELECTRONICS AT ALL COSTS!!!!  They took the money and never shipped.  No one will answer a phone there - same for email and faxes.  AGAIN:  MONTEK ELECTRONICS  WWW.MONTEK.COM IS NOTHING BUT A HUGE RIP OFF - AVOID