Water Heater Size Calculator
Enter your household size and peak usage to get a real recommended tank size or tankless flow rate — not a generic rule of thumb.
Water Heater Error Code Finder
Pick your brand and enter your code — this jumps straight to the right diagnosis on HotWater Decoded.
Brown or Rusty Hot Water
Brown hot water usually means sediment, a failing anode rod, or corroding pipes — and only one of those three is actually urgent.
Cold Water Sandwich
That burst of cold water between two hot spells on a tankless unit has a name — cold water sandwich — and a handful of real fixes.
Tankless Water Heater Beeping
A beeping tankless unit is pairing an audible alert with a code on its display — here’s how to find out what your specific brand’s beep means.
Bradford White ICON Status Light Codes
Bradford White’s ICON gas control system uses its own flash-code language on standard gas tank models — separate from the AeroTherm heat pump line.
A.O. Smith Status Light Codes
What every A.O. Smith gas water heater flash count means, with links to full guides where we’ve verified the fix.
Water Heater Expansion Tank
If your home has a check valve or pressure regulator, you likely need a water heater expansion tank. Here’s how to size and check one.
Water Heater Thermostat
120°F is the standard recommended water heater setting — here’s why, how to test your thermostat, and how to replace one.
Navien & Rinnai Flame Rod Part Numbers
Cross-reference the correct flame rod or electrode kit part number for your Navien or Rinnai tankless model before you order.