Flood Damage – HVAC Equipment: This furnace in Valley, NE was 100% submerged underwater in this basement. You can see the stains right at the top of the white service sticker on the cold air return. This furnace is ruined. There is no saving it. This furnace has to be replaced. For those of you that are hoping that your damage isn’t as bad as you think, apply this simple logic: If an electrical component was under water, it is bad and needs to be replaced. You can’t risk future arcing and a house fire from water damaged wiring or electrical components. If you have a furnace that was only partially submerged, then you need to have an HVAC Technician inspect it for water damage. It may need a few new replacement parts or it may be toast.