9/27/2012 12:09 PM
More specifically, Ants in one of the OSM( output station module)units. Power off the clock and pull out the OSM. Top one controls stations 1-8, next 9-16, next 17-24. Look inside to see if an ant or other bug has shorted itself across a station, otherwise replace the OSM. To test it just unplug the station wires on the right side of the OSM and power up. You should be able to hear it click if it is still shorting out, that way the head isn't coming on to test it.