LAARS Circuit Board Part #’s and Revisions For ALL Models of Wall and Floor 

140 Combi Wall (Gen 1)(Serial # F15000000-F18000308)

New#          Revision#             Model#                                     Old#           

R2080601            SFN 22                 MFTCW140NA1XN                FT1900

140 Combi Wall (Gen 1)(Serial # F18000308-Present)

New#          Revision#             Model#                                     Old#           

R2080605            SFN 24                 MFTCW140NA1XN                FT1899

*(Set dip switches for boiler size, interchangeable with R2080604)

199 Combi Wall (Gen 1)

New#          Revision#             Model#                                     Old#           

R2080604            SFN 24                 MFTCW199NA1XN                FT1899

          *(Set dip switches for boiler size, interchangeable with R2080605)

199 Heat Only Wall (Gen 1)

New#          Revision#             Model#                                     Old#           

R2080602            SFN 10                 MFTHW**(all size)                  FT1052

*(Set dip switches for boiler size)

199 Combi Wall (Gen 2)

New#          Revision#             Model#                                     Old#           

R2080610               SFN 1.01              MFTCW199NA2XN                FT

*(Set dip switches for boiler size, interchangeable with R2080604, R208005)

199 Heat Only Wall (Gen 2)

New#          Revision#             Model#                                     Old#           

R2080611            SFN                      MFTHW199NA2XN                FT

*(Set dip switches for boiler size, interchangeable with R2080602)

199 Combi FT Floor

New#          Revision#             Model#                                     Old#           

R2080606            SFN 1.02              LFTCF199                                FT3034

199 Heat Only FT Floor

New#          Revision#             Model#                                     Old#