HVAC contractors often deal with clients whose basements have flooded, whether from natural disasters or burst water pipes. In many cases, the damage is so severe that replacing the furnace is the only option. If a basement is flooded, all electrical power should be disconnected to the furnace. If it’s a gas-powered furnace, the gas line should also be turned off. Any furnace that has gotten wet should be inspected and tested by a certified HVAC professional before turning it back on. Flood-damaged furnaces are usually replaced rather than repaired. Natural gas furnaces contain a number of valves and other components that are susceptible to failure when exposed to water. While some flooded furnaces can be rebuilt, most manufacturers do not authorize the practice. The liability associated with restoring a flood-damaged furnace is far greater than any savings from keeping the furnace. If the controls or burners have been underwater, for instance, dirt and sediment will corrode the furnace. It just doesn’t add up by having an HVAC professional disassemble, clean, and replace these items, which could eventually malfunction anyway. Instead, the technician may advise moving the furnace to a higher level in cases where the home is in an active flood zone. Another option is to build a concrete floodwall around the furnace. In cases where there is a furnace replacement, it makes the most sense to install a furnace with a higher AFUE rating. These furnaces provide much more comfort and efficiency that furnaces manufactured only a decade ago. And it goes without saying that all installation be provided by a licensed and bonded contractor. Since the safety and well-being of the family is the highest priority, only qualified HVAC contractors should be employed.
The different types of thermostats