Serial Number Locator: Vitocrossal 300, CT3
Floor-standing gas-fired condensing boiler with stainless steel Inox-Crossal heat exchanger surface.
Location #1 of serial number
The 13-digit serial number can be found on the silver label and metal rating plate on the boiler's lower front cover.
Location #2 of serial number
The 13-digit serial number can also be found on a rating plate on the boiler's interior metal shell (lower front cover removed).