The recent flooding has affected many homes in the Louisville area.  Amongst the other problems that this has caused, your furnace operation and safety may have been compromised.  Making your furnace safe can be as simple as cleaning, and disinfecting your furnace.  In more extreme circumstances you may have to replace the entire furnace.  The only way to be sure is to have a qualified licensed heating company perform a safety and efficiency inspection.

Your furnace may be operating after the flood waters recede, but be warned this does not mean it is safe to operate.  Your furnace contains many opportunities for bacteria to grow if the furnace is not properly disinfected by a professional.  Safety controls may also have been affected by the flood waters, and excessive moisture.

The furnaces components affected by the flood water will all have to be replaced.  These items include gas valve, and all safety controls.  The air circulation components, and ignition system.  The heat exchanger can also start to exhibit rusting, and will require replacement.  You should not attempt to operate the furnace without these items being inspected for safety.  Safety and health are the most important considerations after a furnace is flooded.

Yes, it may be necessary to replace your furnace after it has been flooded.  The manufacturers warranties will not apply to any of these items that need to be replace.  In fact most manufacturers will deny all future warranty claims after a flooded furnace incident.

Call your licensed professional to inspect your system, and discuss you options with you after your furnace has flooded.