Condensate line froze. Replaced and checked drain pan. OK. Fan will blow but unit will not fire burners. Is thbere a reset switch?

Did you turn the main power off and then back on to the furnace to reset the fault on the control board?

Turned breaker off waited Ten seconds. Turned back on still doing same.

Still doing the same? Need more info.

Fan Blkowing out cold air. Burners not lighting.

Count the blinks on the control board. To decode the blinking light should be a list on the blower door telling what's wrong. Let us know.