Tech return for tomorrow between 8-11 am to replace gas valve , also discovered water spots on circuit board recommended to replace circuit board humidifier was leaking on into furance also need to replace water panel#35 as well,recommended annual maintenance on furnace and ac system,call this number 630-373-6119 when on way. Tech return. 3-15-17 Installed a new 2 stage gas valve and #35 water panel. Cycled the furnace into 2nd stage with normal operation. Cycled the humidifier with no water leaks after water panel change.