Debunking the Zero-Maintenance Myth of Tankless Water Heaters

The core issue lies within the heat exchanger. As calcium and magnesium from hard or well water accumulate, the system struggles to maintain water flow and temperature. This internal buildup often manifests as inconsistent heat, erratic water pressure, or error codes on the control panel. If ignored, these symptoms can lead to permanent damage to the heat exchanger, which ranks among the most expensive components to replace.

Annual flushing remains the primary defense against such degradation. By circulating a descaling solution through the system, professionals remove mineral deposits that force the unit to work harder and consume more energy. Beyond flushing, Wickersheim emphasizes the importance of inspecting air intake and exhaust vents to ensure debris or insects do not obstruct safe operation. Scheduling these check-ups during the spring or fall can improve service availability, as demand for plumbing professionals typically dips during these months. For those who have recently moved into a home with an existing unit, securing past maintenance records or scheduling an immediate inspection is a critical step in ensuring long-term reliability.