Is your tankless water heater making noise? Is your water not getting hot enough when you have the fixture on high flow? These are telltale signs your on-demand water heater needs service from a trained professional. If you have a water well or live in an area with hard water, you may need to have your system flushed with a mineral dissolving agent. If you live in Wheaton or Glen Ellyn, just call (630) 260-0030 to schedule tankless water heater service.