A Korean maker of high-efficiency tankless water heaters and combination boilers for homes and light commercial use.
Navien is a Korean maker of high-efficiency tankless water heaters and combination boiler units, and its products are common in newer Nashville homes and remodels. They offer on-demand hot water and sometimes space heating. Because they are high-efficiency condensing units, they depend on a clear condensate drain, proper venting and regular descaling, and service calls often involve error codes, scale, flow problems or ignition faults.
We service Navien units by reading error codes, checking ignition, flame, flow and temperature sensors, the condensate drain and venting and flushing the heat exchanger when needed. We explain what we find and set a maintenance schedule that fits your water. If a major part or a replacement is the best path, we say so plainly.
Visit the official Navien website
We decode and confirm faults.
Blockages can shut the unit down.
Hard water scales the heat exchanger.
Weak flow causes cold bursts.
Condensing units need proper exhaust.
Yearly flushing extends life.
Check the symptoms, compare repair and replacement or ballpark a budget.
Appliance Symptom Checker: What Is Wrong?Pick an appliance and tick what you see and hear to get likely causes, safety notes and the service page that fits.Try it 
Repair or Replace CalculatorEnter the appliance, its age, the repair quote and a new unit price to see a plain repair or replace recommendation.Try it 
Appliance Repair and Installation Budget PlannerPick a repair or installation, set the quantity and add extras to see a ballpark planning range for your appliance project.Try it Codes point to ignition, venting, flow or sensor faults. We test and correct the cause.
Yes. A clogged condensate drain is a common cause of shutdowns.
No. We are an independent repair and installation company, and Navien is a trademark of its owner. We service many makers and are glad to look at your model.
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