Tankless Water Heater Repair — Specialist Service

Tankless water heaters are reliable, but they're not maintenance-free. Scale buildup from hard water, ignition failures, flow sensor issues, and error codes all require a technician who understands these sophisticated systems.

Got Plumbing USA connects you with plumbers who specialize in tankless water heater repair across all major brands — Rinnai, Navien, Noritz, Rheem, and more.

Common Tankless Problems

• Error codes displaying on the unit
• Fluctuating water temperature (the "cold water sandwich" effect)
• Ignition failure — unit won't fire up
• Scale buildup reducing efficiency and flow rate
• Low water pressure when hot water is running

Repair Process

1. Error code diagnosis and system evaluation.
2. Component testing — flow sensor, gas valve, igniter, flame rod, heat exchanger.
3. Descaling/flushing if mineral buildup is detected.
4. Part replacement with manufacturer-grade components.
5. System testing and performance verification.

Tankless Repair Cost

Common tankless repairs cost $200–$600. Descaling/flushing runs $100–$250. Heat exchanger replacement (the most expensive repair) can cost $500–$1,200. If the unit is beyond economical repair, your technician will discuss replacement options.