Official warranty and serial lookup directory
Every official warranty or serial lookup found in research, with whether the URL was verified live. These are the authority; the decoders here are the reference.
| Brand | Lookup | URL status | Takes | Returns |
|---|---|---|---|---|
| A.O. Smith | hotwater.com | VERIFIED | serial or reference number | warranty status |
| AAON | aaon.com | VERIFIED | serial number | warranty / registration lookup |
| AirEase | airease.com | VERIFIED | serial number | warranty / registration lookup |
| Airquest | airquestcomfort.com | VERIFIED | serial number | warranty / registration lookup |
| Amana HVAC | warranty.goodmanmfg.com | VERIFIED | serial | entitlement |
| Amana HVAC | producthelp.amana.com | VERIFIED | serial number | warranty / registration lookup |
| Amana PTAC | amana-ptac.com | VERIFIED | serial number | warranty / registration lookup |
| American Standard | trane.com | VERIFIED | serial number (+ last name for full certificate) | warranty certificate; product-only info without last name |
| American Standard | americanstandardair.com | VERIFIED | serial number | warranty / registration lookup |
| American Water Heater | americanwaterheater.com | VERIFIED | serial | warranty status |
| Ameristar | ameristarhvac.com | VERIFIED | serial number | warranty / registration lookup |
| Arcoaire | arcoaire.com | VERIFIED | serial number | warranty / registration lookup |
| Armstrong Air | armstrongair.com | VERIFIED | serial number | warranty / registration lookup |
| Bard | bardhvac.com | VERIFIED | serial number | warranty / registration lookup |
| Bertazzoni | us.bertazzoni.com | VERIFIED | serial number | warranty / registration lookup |
| Blomberg | blombergappliances.com | VERIFIED | serial number | warranty / registration lookup |
| Bosch (HVAC) | bosch-home.com | VERIFIED | serial number | warranty / registration lookup |
| Bradford White | bradfordwhite.com | VERIFIED | serial | manufacture date (official date decoder + printed letter chart) |
| Bradford White | warrantycenter.bradfordwhite.com | VERIFIED | serial | warranty details / expiration |
| Broan HVAC | broan-nutone.com | VERIFIED | serial number | warranty / registration lookup |
| Bryant | bryant.com | VERIFIED | serial number + original-owner Y/N | general parts warranty period |
| Carrier | carrier.com | VERIFIED | serial number | current coverage status |
| Champion | york.bosch-hcgroup.com | PARTIAL | serial | warranty details ('HVAC WARRANTY LOOKUP') |
| Champion | championhomecomfort.com | VERIFIED | serial number | warranty / registration lookup |
| Coleman | york.bosch-hcgroup.com | PARTIAL | serial | warranty details ('HVAC WARRANTY LOOKUP') |
| Coleman | colemanac.com | VERIFIED | serial number | warranty / registration lookup |
| Comfortmaker | comfortmaker.com | VERIFIED | serial number | warranty / registration lookup |
| Concord | concord-air.com | VERIFIED | serial number | warranty / registration lookup |
| Crown | velocityboilerworks.com | VERIFIED | serial number | warranty / registration lookup |
| Daikin | warranty.goodmanmfg.com | VERIFIED | serial | entitlement |
| Daikin | daikincomfort.com | VERIFIED | serial number | warranty / registration lookup |
| Danby | danby.com | VERIFIED | serial number | warranty / registration lookup |
| Day & Night | dayandnightcomfort.com | VERIFIED | serial number | warranty / registration lookup |
| Ducane | ducanehvac.com | VERIFIED | serial number | warranty / registration lookup |
| Dunkirk | dunkirk.com | VERIFIED | serial number | warranty / registration lookup |
| Fisher & Paykel | fisherpaykel.com | VERIFIED | serial number | warranty / registration lookup |
| Fraser-Johnston | york.bosch-hcgroup.com | PARTIAL | serial | warranty details ('HVAC WARRANTY LOOKUP') |
| Fraser-Johnston | fraser-johnston.com | VERIFIED | serial number | warranty / registration lookup |
| Frigidaire HVAC | frigidairehvac.com | VERIFIED | serial number | warranty / registration lookup |
| Fujitsu | access.fujitsugeneral.com | VERIFIED | serial number | warranty / registration lookup |
| GE Appliances | geappliances.com | PARTIAL | n/a | support hub |
| GE Appliances | products.geappliances.com | VERIFIED | serial number | warranty / registration lookup |
| GE Zoneline | geappliances.com | VERIFIED | serial number | warranty / registration lookup |
| Generac | generac.com | VERIFIED | serial or model | specs, manuals, FAQs (NOT a date) |
| Gibson HVAC | gibsonhvac.com | VERIFIED | serial number | warranty / registration lookup |
| Goodman | warranty.goodmanmfg.com | VERIFIED | serial | entitlement / warranty (ship-date output not confirmed) |
| Gree | greecomfort.com | VERIFIED | serial number | warranty / registration lookup |
| Haier | haierappliances.com | VERIFIED | serial number | warranty / registration lookup |
| Heil | heil-hvac.com | VERIFIED | serial number | warranty / registration lookup |
| Hisense | hisense-usa.com | VERIFIED | serial number | warranty / registration lookup |
| Hotpoint | hotpoint.com | VERIFIED | serial number | warranty / registration lookup |
| HTP | htproducts.com | VERIFIED | serial number | warranty / registration lookup |
| Huebsch | huebsch.com | VERIFIED | serial number | warranty / registration lookup |
| Intertherm | intertherm.com | VERIFIED | serial number | warranty / registration lookup |
| Janitrol | warranty.goodmanmfg.com | VERIFIED | serial number | warranty / registration lookup |
| JennAir | producthelp.jennair.com | VERIFIED | serial number | warranty / registration lookup |
| KeepRite | keeprite.com | VERIFIED | serial number | warranty / registration lookup |
| Kenmore HVAC | kenmore.com | VERIFIED | serial number | warranty / registration lookup |
| KitchenAid | whirlpool.com | UNSOURCED | unknown (site returns 403 to non-browser fetch) | unknown |
| KitchenAid | producthelp.kitchenaid.com | VERIFIED | serial number | warranty / registration lookup |
| Kohler | rehlko.com | UNSOURCED | n/a | kohlerpower.com now redirects to rehlko.com; lookup not located |
| Laars | laars.com | VERIFIED | serial number | warranty / registration lookup |
| Lennox | lennox.com | VERIFIED | serial (####A#####, A##A######, AA##A#####) | Your Product's Coverage |
| LG | lghvac.com | VERIFIED | serial number | warranty / registration lookup |
| LG Appliances | lg.com | PARTIAL | n/a | support hub |
| Liebherr | liebherr.com | VERIFIED | serial number | warranty / registration lookup |
| Luxaire | york.bosch-hcgroup.com | PARTIAL | serial | warranty details ('HVAC WARRANTY LOOKUP') |
| Luxaire | luxaire.com | VERIFIED | serial number | warranty / registration lookup |
| Magic-Pak | magicpak.com | VERIFIED | serial number | warranty / registration lookup |
| Maytag | whirlpool.com | UNSOURCED | unknown (site returns 403 to non-browser fetch) | unknown |
| Maytag | producthelp.maytag.com | VERIFIED | serial number | warranty / registration lookup |
| Maytag HVAC | maytaghvac.com | VERIFIED | serial number | warranty / registration lookup |
| Midea | midea.com | VERIFIED | serial number | warranty / registration lookup |
| Miller (mobile home) | millerhvac.com | VERIFIED | serial number | warranty / registration lookup |
| Mitsubishi Electric | mitsubishicomfort.com | VERIFIED | serial number | warranty / registration lookup |
| Monogram | monogram.com | VERIFIED | serial number | warranty / registration lookup |
| MrCool | mrcool.com | VERIFIED | serial number | warranty / registration lookup |
| Navien | navieninc.com | UNSOURCED | model dropdown only; serial by phone 800-519-8794 opt 3 | general warranty terms |
| Noritz | noritz.com | VERIFIED | serial number | warranty / registration lookup |
| Panasonic | shop.panasonic.com | VERIFIED | serial number | warranty / registration lookup |
| Payne | productregistration.carrier.com | PARTIAL | serial | registration / entitlement |
| Payne | payne.com | VERIFIED | serial number | warranty / registration lookup |
| Peerless | peerlessboilers.com | VERIFIED | serial number | warranty / registration lookup |
| Pioneer | pioneerminisplit.com | VERIFIED | serial number | warranty / registration lookup |
| Reliance | reliancewaterheaters.com | VERIFIED | serial number | warranty / registration lookup |
| Rheem | rheem.registermyunit.com | VERIFIED | serial number | warranty terms and coverage |
| Richmond | richmondwaterheaters.com | VERIFIED | serial number | warranty / registration lookup |
| Rinnai | rinnai.us | UNSOURCED | registration only | n/a; warranty questions by phone (800) 621-9419 |
| RunTru | runtruhvac.com | VERIFIED | serial number | warranty / registration lookup |
| Ruud | rheem.registermyunit.com | UNSOURCED | serial | warranty terms |
| Ruud Water Heaters | ruud.com | VERIFIED | serial number | warranty / registration lookup |
| Samsung | samsung.com | VERIFIED | serial number | warranty / registration lookup |
| Samsung Appliances | samsung.com | PARTIAL | n/a | warranty info page |
| Senville | senville.com | VERIFIED | serial number | warranty / registration lookup |
| Sharp | getsupport.sharpusa.com | VERIFIED | serial number | warranty / registration lookup |
| Smeg | smeg.com | VERIFIED | serial number | warranty / registration lookup |
| Speed Queen | speedqueen.com | VERIFIED | serial number | warranty / registration lookup |
| State | statewaterheaters.com | VERIFIED | serial | warranty status |
| Stiebel Eltron | stiebel-eltron-usa.com | VERIFIED | serial number | warranty / registration lookup |
| Sub-Zero | subzero-wolf.com | VERIFIED | serial number | warranty / registration lookup |
| Takagi | takagi.com | VERIFIED | serial number | warranty / registration lookup |
| Tempstar | tempstar.com | VERIFIED | serial number | warranty / registration lookup |
| Thermo Pride | thermopride.com | VERIFIED | serial number | warranty / registration lookup |
| Trane | trane.com | VERIFIED | serial number (+ last name for full certificate) | warranty certificate; product-only info without last name |
| True Residential | truemfg.com | VERIFIED | serial number | warranty / registration lookup |
| U-Line | u-line.com | VERIFIED | serial number | warranty / registration lookup |
| Utica | uticaboilers.com | VERIFIED | serial number | warranty / registration lookup |
| Viking | vikingrange.com | VERIFIED | serial number | warranty / registration lookup |
| WaterFurnace | warranty.waterfurnace.com | VERIFIED | serial number | warranty / registration lookup |
| WeatherKing | rheem.registermyunit.com | VERIFIED | serial number | warranty / registration lookup |
| Weil-McLain | weil-mclain.com | VERIFIED | serial number | warranty / registration lookup |
| Westinghouse HVAC | westinghouse.com | VERIFIED | serial number | warranty / registration lookup |
| Whirlpool | whirlpool.com | UNSOURCED | unknown (site returns 403 to non-browser fetch) | unknown |
| Whirlpool Water Heaters | whirlpoolwaterheaters.com | VERIFIED | serial number | warranty / registration lookup |
| Williams | williamscomfort.com | VERIFIED | serial number | warranty / registration lookup |
| Wolf | subzero-wolf.com | VERIFIED | serial number | warranty / registration lookup |
| York | york.bosch-hcgroup.com | PARTIAL | serial | warranty details ('HVAC WARRANTY LOOKUP') |
Brands without an online serial lookup (Rinnai, Navien in this research) take warranty questions by phone.