Ruud serial age
Manufacture date from the rating-plate serial. Same family as Rheem. A printed MFR date on the plate still wins.
Ruud
Type the serial off the rating plate. Spaces and hyphens are ignored. Manufacture date is not the install date.
Diagnose this call
Age is open. The walkthrough is the seat.
Where the plate is
Same serial styles as Rheem.
Styles
Current HVAC
W291013412
Plant letter + week + year. Same read as Rheem.
Older
CB5D302F099903346
Week and year follow the middle factory letter.
Same date-code family: Rheem.
Cross-checked against Ruud HVAC age. FieldBench does not host or republish that page. Letter charts we could not verify are linked out instead of invented.