About Us

HotWater Decoded is a specialist information resource for homeowners dealing with a water heater problem: an error code on a tankless unit, a blinking status light, no hot water, a leak, or a decision about whether to repair or replace an aging system.

Most water heater advice online is either buried in a 40-page manufacturer manual, scattered across paid Q&A sites and forum threads, or written by a local plumbing company mainly to generate service calls. We built HotWater Decoded to do one thing well: give a clear, specific, safety-conscious answer for your exact brand, model, and code — organized so you can find it in under a minute.

What we cover

Brand and model-specific error codes for tankless water heaters (Rinnai, Navien, Rheem, Noritz) and heat pump water heaters (Rheem ProTerra, A.O. Smith, Bradford White AeroTherm)
Common symptoms on standard tank water heaters — no hot water, leaks, noise, smell, pilot light problems
Maintenance guides: flushing, anode rods, thermostats, expansion tanks, and parts reference
Buying and comparison guides for tankless and heat pump water heaters, and repair-or-replace cost breakdowns
Interactive tools: a water heater size calculator and a cross-brand error code finder

How we work

Every guide on this site is researched against manufacturer documentation, published industry and government data (such as ENERGY STAR, the U.S. Department of Energy, and the EPA), and real, documented repair and troubleshooting patterns. Where we could not independently confirm a specific technical detail against a named source, we say so directly in the article rather than presenting it as certain.

Content that involves gas, electrical, or refrigerant work is technically reviewed by a licensed technician on our team before publication. See our Editorial Policy for the full detail on how we research, write, and review our guides, and our Disclaimer for important safety information before attempting any repair yourself.

Get in touch

Found an error, have a code we haven’t covered yet, or just want to ask something? Contact us at gozan.contact@gmail.com or visit our Contact page.