Water Heater Error Code Finder

Pick your brand below and enter the code shown on your display. If we’ve published a full guide for it, this jumps you straight there.

Illustration of three different tankless water heater remote control panels laid out side by side.

Brand

Code

FAQ

What if my exact code isn’t in the finder?

We’re adding brand and code coverage continuously — check the matching brand’s error code hub for the closest documented code, or check your unit’s own manual for now.

Written by HotWater Decoded — water heater repair specialists. Technically reviewed by a licensed technician on our team.

Sources

Built from HotWater Decoded’s own published error code guides across Rinnai, Navien, Rheem, Noritz, A.O. Smith, and Bradford White