Heil serial age
Manufacture date from the rating-plate serial. Same family as Tempstar, Comfortmaker, ICP. A printed MFR date on the plate still wins.
Heil
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
ICP-family plate. Indoor vestibule or outdoor side panel.
Styles
Current
E072514528
Leading letter, then year, then week (or month when 01–12). E0725… = 2007 week 25.
Same date-code family: Tempstar, Comfortmaker.
Cross-checked against Heil HVAC age. FieldBench does not host or republish that page. Letter charts we could not verify are linked out instead of invented.