Decodobot: Easy Appliance Age

DecodoBot is being retired and will stop functioning after April 15, 2026. It has been replaced by SerialCheck, an offline appliance age decoder available separately.


Decodobot helps you identify manufacture dates (age) for common water heaters and HVAC equipment by decoding serial numbers. Select the appliance type, enter the model/serial info from the label, and get an instant result you can copy or share.
Built for home inspectors, property managers, and service pros who want quick answers without digging through PDFs, guessing at serial formats, or fighting bad signal in the field.
What changed in 2.0:
Reporting removed
OCR removed (no camera scans required)
New workflow focused on fast, accurate decoding
Key features:
Fast age decoding for common water heaters and HVAC
Simple guided entry: select type, enter info, decode age
Copy/share results in a clean, readable format
Designed to work well in low-signal situations
Narrowed appliance types to focus on the most common units
Coverage targets:
Decodobot targets 75%+ of HVAC and 90%+ of water heaters in the US market. Coverage varies by brand and serial format.
Supported brands (by category):
Water Heaters:
Bradford White, Jetglas, AO Smith, Permaglas, Glascote, American Water Heater, Champion, Riviera, Aquamatic, Aqua Therm By American Water Heater, Raywall, Best Deluxe, King-Line, Whirlpool, Enviortemp, Deluxe, Prestige, Sentinel, Proline, Proline-Plus, Aqua Temp, Premier, Nationaline, King-Cleen, Revere, Apex, Navien, Rinnai, Rheem, Richmond, Vista Therm, Aqua Therm By Rheem, Energy Master, Intertherm & Miller, Citation, ABS, Mainstream, Cimarron, Servistar, Van Guard, True Value, Ruud, Coast To Coast, Montgomery Ward, State, Kenmore, Freedom, Freedom/Nipsco, Ambassador, Ace, Barnett, Crosley, Century, Nationaline By State, President, Energy Stretcher, Thermo-Ki, Regency, Reliance, Mission
Furnaces:
Lennox, Armstrong, Armstrong Air, Airease, Ducane, Concord, Magicpak, ADP, Goodman, Amana, Daikin, Janitrol, Carrier, Bryant, Payne, ICP, Comfortmaker, Heil, Tempstar, Arcoaire, Airquest, Keeprite, Keep Rite, Day And Night, Trane, American Standard, Runtru, Oxbox, Ameristar, Rheem, Ruud, Weatherking, Weather King, Sure Comfort, Surecomfort, York, Coleman, Luxaire, Guardian, Champion, Fraser-Johnston, Evcon
AC Outdoor Units:
Lennox, Armstrong, Armstrong Air, Airease, Ducane, Concord, Magicpak, ADP, Goodman, Amana, Daikin, Janitrol, Carrier, Bryant, Payne, ICP, Comfortmaker, Heil, Tempstar, Arcoaire, Airquest, Keeprite, Keep Rite, Day And Night, Trane, American Standard, Runtru, Oxbox, Ameristar, Rheem, Ruud, Weatherking, Weather King, Sure Comfort, Surecomfort, York, Coleman, Luxaire, Guardian, Champion, Fraser-Johnston, Evcon