Updated 2026-08-28
Furnace Error Codes by Brand
Pick your furnace brand to see its flash/fault code list, what each code means, and the safe checks to try first.
Carrier furnace codes11 codesGoodman furnace codes11 codesTrane furnace codes12 codesLennox furnace codes10 codesRheem furnace codes10 codesYork furnace codes12 codesHeil furnace codes11 codesFrigidaire furnace codes10 codesArmstrong Air furnace codes12 codesBryant furnace codes11 codesPayne furnace codes11 codesAmana furnace codes11 codesAmerican Standard furnace codes12 codesRuud furnace codes10 codes