Equipment category · 37 source-linked records

HVAC and furnace error codes,
with the source in view.

When your furnace blinking red light won't stop, check the pattern or number against the manufacturer's manual. These furnace error codes—including Daikin modulating gas furnace codes, Goodman furnace blink codes, and Trane records—come from official manufacturer manuals and remain tied to their named equipment families. They are not a general HVAC code list, and technician-facing displays are not homeowner repair instructions.