No heat furnace repair, Unit was off on 3 flashes Pressure switch error code. Checked venting- had a frozen icicle at the termination. Tried firing the unit, but the ventor motor was full of ice, removed ice and began testing. System ran for 5 mins then cut out and ventor motor was full of water. Drained water Checked the drain, iced up Condensate pump completely frozen and the lines for the drain. Condensate 3/8 line completly frozen. Removed 3/8 line and ran it into a bucket until everything thaws. Ran system for 25min - no issues