A Japanese maker known for gas tankless water heaters that supply hot water on demand to homes and businesses.
Rinnai is a Japanese maker known for gas tankless water heaters, which provide hot water on demand instead of storing it in a tank. They are popular in newer Nashville homes and in remodels that want to free up space. Because they burn more gas at once and have electronic controls, tankless heaters need regular descaling and careful venting, and many failures come from scale, flow problems or ignition faults.
We service Rinnai tankless heaters by reading error codes, checking ignition and flame, flow and temperature sensors, venting and the gas supply and flushing the unit with a descaling solution when needed. We explain what we find, set a maintenance schedule that fits your water and tell you plainly when a part or a replacement makes sense.
Visit the official Rinnai website
We decode and confirm faults.
Hard water scales the heat exchanger.
Reliable firing is the key.
Weak flow causes cold bursts.
Safe exhaust is checked.
Yearly flushing extends life.
Tankless Water Heater RepairRepair and descaling for tankless water heaters: error codes, ignition faults, mineral buildup, flow sensors and cold water…Explore 
Hot Water Heater InstallationWater heater replacement: tank and tankless, gas and electric, with proper venting, pan and drain, relief valve and…Explore 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 Usually once a year, and more often in hard water.
It points to ignition, flow, venting or sensor faults. We test and fix the cause.
No. We are an independent repair and installation company, and Rinnai is a trademark of its owner. We service many makers and are glad to look at your model.
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