Start with the
right rooftop.
Check the model prefix, find the manufacturer reference and carry the unit into a service report.
Three rooftop families to start. Coverage is shown beside each reference.
Browse the equipment library
Carrier WeatherMaker 48TC
Open family reference →48TC gas/electric, sizes 07, 08, 09, 12, 14 and 16 in the 2020 product data.
Trane Precedent YSC
Open family reference →Legacy YSC036E, YSC048E and YSC060E gas/electric rooftops in RT-SVX21R-EN.
Lennox Model L LGM
Open family reference →LGM156U5, LGM180U5, LGM210U5, LGM240U5 and LGM300U5, R-454B gas/electric.
A useful record starts
at the nameplate.
Keep the full model, serial and site equipment tag together. Record the control and accessory identities when they matter. Selecting a family here does not confirm a part fit or a service procedure.
The free report builder keeps findings, completed work, readings and photos under each unit. No account or email required.
Build a service report →Independent BoltWright reference. Manufacturer names identify the equipment; no manufacturer endorsement is implied. Reference entries checked 2026-09-09. OEM documents remain on the manufacturer’s site.