Is your Rinnai tankless water heater displaying a diagnostic code? Use our complete error code directory, model index, and troubleshooting fixes for Codes 11, 12, and LC from Seneca's water heater specialists at All Hot Water LLC.

Thinking about replacing your own tank water heater? Review our step-by-step installation guide, essential South Carolina plumbing and electrical codes, and the hidden hazards of tackling this job DIY.