How Flooding May Damage Your HVAC System

Posted on: 2 June 2016

You probably know that storms and floods can damage your heating, ventilation, and air conditioning (HVAC) system, but do you know how the damage occurs? Here are some parts of the system that floods may damage, and the specific damage they may incur:


The major danger of having water in the ductwork is that it may spread dangerous pathogens throughout the house. For example, floodwater may be contaminated with sewage effluent, which contains dangerous microorganisms. Another problem is that the water increases the risk of mold growth inside the HVAC system. What can be salvaged should be cleaned, dried, and disinfected. In most cases, the insulation is discarded while the metal ductwork is cleaned and disinfected.

Electrical Systems

Water conducts electricity, which means it can connect parts of an electrical circuit that shouldn't be connected. Such a short-circuit fault can fry your system and disable some of its parts.  HVAC system contains many electrical parts. Examples include outdoor fan motor, compressor, timer, transformers, wires and many others. The extent of the flood determines which of these parts get damaged.

For this reason, it's advisable to shut off power to the unit during and after a flood if its location is flooded. Have an HVAC technician inspect the unit and make the necessary repairs before using it again.

Metallic Components

Most metals are susceptible to corrosion. Water or moisture accelerates corrosion, which means the metallic parts of your HVAC unit are likely to be corroded after being exposed to water. Corrosion deteriorates the metal components and accelerates their wear and tear; this reduces the efficiency of the unit.

Corrosion damage may not be immediately apparent, but it is likely to occur if the unit isn't promptly cleaned and dried. The longer water stagnates in the unit, the higher the chances of corrosion. This is another reason you shouldn't delay calling a technician if your HVAC unit is exposed to water.


Damage from flooding isn't just due to the water alone. A typical flood carries with it mud and other debris that can also damage the unit. The debris will clog the internal components of the unit and prevent them from operating at peak efficiency. For example, the air filters can be clogged with mud and prevent them from operating normally. Cleaning or replacing the filters after the flood is mandatory.

Talk to a technician about the measures of shielding your HVAC system from the effects of floods and storms. You will also need the technician's expertise in cleaning and servicing the system if it has been exposed to floodwater and debris.

For more information, contact Chappel's Heating & Cooling or a similar company.


update that old heating system

How long have you been putting off replacing your heating system in your home? Do you worry that the cost of the new system will cost you too much? Have you thought about how much you are losing by not replacing that old furnace? This blog will help you understand how making an investment on a new heating system for your home can actually save you a lot more over the next ten years than you spend on the system and the installation work. Hopefully, by the time you are done reading, you will know what you have to do and why you shouldn't put it off any longer.

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