Carrier, Bryant and Payne furnace status codes

Carrier status codes are two digits, shown as short flashes for the first digit and long flashes for the second. Bryant and Payne furnaces of the same generation use the same control and the same codes.

Also covers: Bryant, Payne — same manufacturer, same controls, same codes.

Carrier's integrated furnace controls report faults as two-digit status codes rather than a simple count. The first digit is the number of short flashes and the second is the number of long flashes, so code 33 is three short flashes followed by three long ones. Bryant and Payne are the same manufacturer and use the same control, so these codes apply across all three brands.

Worth knowing before you count

On red LED Carrier boards, stored codes are erased whenever power to the control is interrupted. Switching a faulted furnace off and on before reading the display destroys the information you were about to look up. Amber LED boards keep the code through a power cut — but their retrieval procedure has a four second limit that will overwrite the stored code with a false one if exceeded.

Carrier and Bryant

Status code 11 — No previous code stored
Status code 12 — Blower running after power up
Status code 13 — Limit circuit lockout
Status code 14 — Ignition lockout
Status code 21 — Gas heating lockout — will not reset automatically
Status code 22 — Abnormal flame-proving signal — flame detected with the gas valve closed
Status code 23 — Pressure switch did not open
Status code 24 — Secondary voltage fuse is open
Status code 31 — Pressure switch did not close, or reopened
Status code 33 — Limit circuit fault — a limit or flame rollout switch is open
Status code 34 — Ignition proving failure
Status code 45 — Control circuitry lockout
LED continuously off — No power reaching the control
LED rapid flashing — Line voltage polarity reversed
Status code retrieval, amber LED controls — How to read stored status codes on Carrier amber LED boards

Other manufacturers

This site is a reference, not a substitute for a licensed HVAC technician. Gas appliances can leak carbon monoxide and cause fire. Anything involving gas lines, the heat exchanger, or the flame sensing circuit should be handled by a licensed professional. Pages are written with AI assistance from the sources listed on each page and checked against them before publishing.