How old is my WeatherKing unit?
WeatherKing is part of Rheem Manufacturing. 5 serial formats sourced across central air conditioner, heat pump, furnace.
Serial number decoder for WeatherKing
Type the serial from the data plate, not the model number. Nothing is sent anywhere; the tables are in this page.
Format example: W291013412
- WeatherKing air conditioner serial numbers in the era not stated format encode the year as digits 4-5 (YY) and the week as digits 2-3 (source: building-center.org).
- Example: serial W291013412 decodes to week 29 of 2010.
- WeatherKing air conditioner serial numbers in the before 1989 format encode the year as digits 2-3 (YY; 19YY, Addison Products era, pre-1990) and the month as digits 4-5 (01-12) (source: building-center.org).
- Example: serial 28607168189 decodes to July 1986.
- WeatherKing's official lookup at rheem.registermyunit.com returns warranty / registration lookup.
Decoder pages by product
Format eras
- 1990 to 1995 VERIFIED
############Central Air Conditioner, Heat Pump, Furnace, Packaged Unit - before 1989 VERIFIED
###########Central Air Conditioner, Heat Pump, Furnace, Packaged Unit - era not stated VERIFIED
A#########Central Air Conditioner, Heat Pump, Furnace, Packaged Unit - era not stated VERIFIED
#### A#### #####Central Air Conditioner, Heat Pump, Furnace, Packaged Unit - era not stated VERIFIED
####A#####Water Heater, Tankless Water Heater
Official lookup: the authority
Open the official WeatherKing lookup takes serial number; returns warranty / registration lookup; URL verified live
This site is a reference built from published tables. The manufacturer's own lookup wins whenever the two disagree.
What we could not confirm
- WeatherKing is treated as sharing Rheem's format because the source lists it in that family; the corporate relationship itself is an estimate.
- The 1990 to 1995 format is documented but not decodable here: example 009920304091 does not decode with the derived engine.
- Registered trademark of Rheem. Residential WeatherKing after 1988 = Rheem-built, Rheem styles 1-4 apply (same_format_as Rheem). Two Addison-era styles added as rules (11-digit pre-1990, 12-digit post-1990 commercial). weatherkingac.com is dead (curl 000); registermyunit brand=weatherking returns 200.
Sources
- https://www.building-center.org/rheem/
- https://www.building-center.org/weatherking-hvac-age/
- img: WeatherKing-HVAC-style-5.jpg (transcribed)
- img: WeatherKing-HVAC-style-6.jpg (transcribed)
- https://www.rheem.com/faq/official
- https://rheem.registermyunit.com/en-US/warranty/brand?brand=weatherkingofficial