A condensing tankless heater produces condensate during operation and routes it through a drain. Water on the floor can come from that drain path or from a supply connection. Note where water first appears instead of assuming it came from the heater cabinet.
Observe without opening the heater
Look for water near the drain tubing, its outlet, and visible water connections. Note whether the moisture appears only when the heater runs. Leave equipment covers in place and avoid touching wet electrical components.
Give the technician the model and timing
Share photos of the visible drain route and report any error message. A technician can check for a blocked drain, a disconnected fitting, or a separate water leak. The manufacturer’s instructions determine what drain and neutralizer service the model needs.
Learn more about our water heater repair service.