Tankless Water Heater Repair in Branson, MO

Our technician arrives with a diagnostic toolkit. We visually inspect: Is the display lit? Are there error codes? Is there visible corrosion, leaking, or damage? We check gas connections, water lines, venting, and the electrical plug. We listen to startup and operation. We measure water pressure and temperature. We test gas supply pressure if applicable. This inspection often narrows the problem to one or two components.

• Power on unit and observe display, codes, startup
• Measure incoming water pressure (minimum 20 PSI)
• Measure inlet water temperature and setpoint
• Check gas connections and pressure (gas models)
• Inspect water inlet filter for debris
• Listen for ignition clicks, burner hum, unusual sounds

Once inspection narrows it down, we run specific tests. For no-heat or ignition failures, we test the ignition electrode and gas supply pressure. For temperature fluctuation, we measure flow sensor output and run temperature stability tests. For error codes, we consult manufacturer guides and test the flagged sensor or component. For scaling, we flush with descaling solution and remeasure heat exchanger temperature. This pinpoints the exact failed component.

• Test ignition spark (gas models) with proper spark tester
• Measure gas supply pressure and compare to manufacturer spec
• Test water inlet flow sensor by simulating demand
• Perform temperature rise test across multiple flow rates
• Run multi-minute temperature stability test to detect fluctuation
• Clean or replace water inlet filter to eliminate blockage as a variable
• Consult manufacturer’s fault code guide to confirm diagnosis

Once we know what’s broken, we fix it. Most repairs are part replacements: corroded gas valve, failed ignition module, bad temperature sensor, clogged water inlet filter, or broken display panel. We use OEM parts (original equipment manufacturer) for durability and warranty coverage. If scaling is the issue, we run a descaling protocol, flushing the heat exchanger with approved solution and measuring recovered heat transfer. If the repair involves gas-side work, we pressure-test and perform combustion analysis after to confirm safety.

• Replace faulty ignition electrode or ignition module (gas models)
• Replace corroded gas control valve
• Replace failed water inlet sensor or temperature sensor
• Clean or replace water inlet strainer and filter
• Flush heat exchanger with descaling solution for hard water buildup
• Replace broken display panel or control board
• Test combustion and vent draw after any gas-side repair (gas models)
• Pressure-test all water connections after any water-side repair

Before we finish, we test your repaired unit thoroughly. We run it through multiple flow rates and temperatures to confirm stability. We power it off and on to verify ignition and display. For gas units, we perform combustion analysis and vent draw testing. We check that error codes are cleared and the unit operates normally. We walk you through what failed, what we did to fix it, and what steps you can take to prevent future failures—especially if scaling was the culprit.

• Activate unit and confirm ignition and heating (gas or electric)
• Measure outlet water temperature across multiple flow rates
• Confirm temperature stability—no wild swings or overshooting
• Verify error codes are cleared and unit displays “Ready”
• Test safety shutdown if flow drops below minimum threshold
• Perform combustion analysis and vent draw test (gas models)
• Confirm unit cycles on and off normally during 15-minute full-load test
• Walk you through the repair, failure root cause, and prevention steps
• Provide written invoice with parts replaced and labor hours
• Explain warranty: parts warranty (typically 1 year), labor warranty (12 months)