Ruud achiever 90 plus gas furnace not turning on

Question

Some time during the day/nite the system will not start heating. No fan no clicks just nothing. The only work around we've found is to cycle the power and it will work for maybe a day or two. I've checked and clean four heat detectors. We've had three or four companies in. The last and most expensive solution to date is to replace the control board. Any one with any back ground on this would be appreciated.