How House Works

Carrier furnace code 13 (1 short, 3 long): limit circuit lockout

By How House Works EditorialBased on Carrier, Bryant and Payne service labels and manualsChecked against sources Updated

Furnace control LED

13

“LIMIT CIRCUIT LOCKOUT”

Printed on 20 model series · 30 documents

58MCB, 58STA/58STX, PG8MAA/PG8JAA, 58SB0A/58SC0A, 810SA, PG80ESAA, 820SA, 58TP0A, 58TN0A, 880TA, 59SC2D, 59SC5A, 59SP5A, 59SC5B, 59SP6A, 59TP6A/59TP6B, PG96VAT, 59TN6B, 986TC, 59MN7B, 59SU5A, 935SA, 59CU5A, PG80ESU, Guide TG-GFC80-02 (models not listed), 59MN7A Series 100, 58MVP/58MVB/58UVB · 58MCB-4SM p. 15; 58ST-24SI p. 43; IM-PG8J-17 p. 43; 58SC0A-05SI p. 26; 58SB0A-04SI p. 26; II810SA-05 p. 26; IM-PG80ESA-05 p. 26; IM-PG80ESAA-04 p. 27; II820SA-02 p. 26; 58TP0A-02SI p. 37; 58TN0A-02SI p. 35; II880TA-02 p. 35; 59SC2D-02SI p. 61; 59SC5A-13SI p. 67; 59SP5A-18SI p. 70; 59SC5B-04SI p. 63; 59SP6A-01SI p. 59; 59TP6A-10SI p. 73; 59TP6B_04SI p. 67; IM-PG96VAT-13 p. 70; 59TN6B-01SI p. 60; II986TC-01 p. 60; 59MN7B-02SI p. 73; 59SU5A-05SI p. 51; II935SA-05 p. 51; 59CU5A-01SI p. 65; GFULN80-G-01TS p. 6; TG-GFC80-02 p. 6; 59MN7A-01T p. 8; 58-06T p. 7

Owner checks, then technician

What it means

Code 13 is one short flash followed by three long ones. On most Carrier, Bryant and Payne labels it is “LIMIT CIRCUIT LOCKOUT”: a limit or flame rollout switch stayed open longer than 3 minutes and the control locked out. The control resets itself after three hours, and the label sends you to code 33 for the causes 59SC5A-13SI, p. 67. Code 33 is the same open switch before those 3 minutes pass; after that, 33 changes to 13 59SC5A-13SI, p. 67.

On the 58STA, 58SB0A, 58SC0A, 820SA, 58TP0A and 58TN0A families the label also lists the draft safeguard and a blocked vent switch, if used 58SC0A-05SI, p. 26; 58TN0A-02SI, p. 35. On two-stage boards the lockout also follows 10 successive limit trips during high heat, and on the modulating 59MN7B during maximum heat 59TP6A-10SI, p. 73; 59MN7B-02SI, p. 73.

Check these first

Carrier’s owner’s manuals have no code table. These steps come from their general checklist, “Before you request a service call”, where it matches a cause the label gives for 13 or, through its “Refer to #33”, for 33.

  1. Write the code down before you turn off the power or remove the blower access door, as Carrier’s owner’s manual for condensing furnaces asks OM9GFRC-02, p. 10. Carrier’s 80% owner’s manual does not mention the LED. How to count the flashes: reading a Carrier code.
  2. Most labels list “Dirty filter or restricted duct system” under 33; the 59SU5A, Bryant 935SA, 59CU5A and Payne PG80ESU labels list it under 13 itself 59SC5A-13SI, p. 67; 59SU5A-05SI, p. 51; GFULN80-G-01TS, p. 6. The owner’s manual lets you check for a dirty air filter and for return-air or supply-air grilles that are blocked or closed OM9GFRC-02, pp. 10–11; 80GSFRN-C-03OM, p. 7. It says a dirty filter can make the furnace overheat and shut down automatically, and asks for the filter to be checked every four weeks OM9GFRC-02, p. 7.
  3. Through code 33, the label says the flame rollout switch requires a manual reset 59SC5A-13SI, p. 67. The owner’s manual gives you that step, behind the furnace door. First turn off the electrical power supply to the furnace and install a lockout tag before removing the access doors OM9GFRC-02, p. 10; Carrier’s 80% manual says to turn off the electrical power supply before removing the access doors 80GSFRN-C-03OM, pp. 5, 7. On condensing furnaces, push the button on the manual reset rollout switch on the burner box; if it trips again, shut down the furnace and call for service OM9GFRC-02, p. 11. Carrier’s 80% manual names manual reset limit switches on the ends of the burner enclosure, reset the same way; if one trips a second time, turn off the furnace and call for service 80GSFRN-C-03OM, p. 7. The 80% manual does not use the word rollout; this page treats those switches as the ones the label calls the flame rollout switch.
  4. The manual’s start-up steps replace the main furnace door before the electrical supply is turned on OM9GFRC-02, p. 5, steps 7 and 8.
  5. The label says the control clears the lockout itself after three hours 59SC5A-13SI, p. 67. If you shut the furnace down because of a malfunction, the owner’s manual says to call your dealer as soon as possible OM9GFRC-02, p. 6.

The 59SU5A, 935SA, 59CU5A and PG80ESU labels do not mention a rollout switch for code 13, so step 3 does not come from their labels 59SU5A-05SI, p. 51; 59CU5A-01SI, p. 65; GFULN80-G-01TS, p. 6. The 33 lists of the 59TP6A, 59TP6B and PG96VAT, the 59TN6B and 986TC, the 59MN7B and the 58MVP do not name the filter, so step 2 does not come from their labels 59TP6A-10SI, p. 73; 59TN6B-01SI, p. 60; 59MN7B-02SI, p. 73; 58-06T, p. 8.

When to call a licensed technician

  • The rollout or limit switch trips again after you push the button OM9GFRC-02, p. 11; 80GSFRN-C-03OM, p. 7.
  • The furnace still fails to operate after the checklist OM9GFRC-02, p. 11.
  • The causes listed under 33 on most labels: a loose blower wheel, a defective blower motor or capacitor, a defective switch or its connections, a restricted vent, vent sizing, excessive wind, and inadequate combustion air supply when the flame rollout switch is open 59SC5A-13SI, p. 67. Two-stage and modulating labels list other items; see the code 33 page.
  • On the 59SU5A, 935SA and 59CU5A, the 13 label lists a loose blower wheel, a restricted vent, vent sizing, a dirty filter or restricted duct system, and a defective switch or connections 59SU5A-05SI, p. 51; 59CU5A-01SI, p. 65. The PG80ESU guide adds excess wind and inadequate combustion air supply with the burner thermal switch open GFULN80-G-01TS, p. 6.
  • The owner’s manual lets untrained people clean and replace air filters and says all other operations must be performed by trained service personnel OM9GFRC-02, p. 2.

Notes for different models

  • The 58PAV and 58RAV Series 131 label calls 13 “LIMIT OR FLAME ROLLOUT SWITCH LOCKOUT”, with an automatic reset after three hours and a manual reset for the flame rollout switch 58P_R-9SM, p. 9.
  • On the 59SU5A, 935SA and 59CU5A the label gives the condition as “Lockout occurs if a limit is open.”, with no 3-minute time 59SU5A-05SI, p. 51; 59CU5A-01SI, p. 65. On the PG80ESU it names a limit, the draft safeguard, the burner thermal switch or a blocked vent switch, if used GFULN80-G-01TS, p. 6.
  • The 59SU5A, 935SA and 59CU5A also have code 26, “BURNER THERMAL SWITCH (BTS) open”, which the label describes as a permanent lockout if the switch is open during a call for heat 59SU5A-05SI, p. 51; 59CU5A-01SI, p. 65.
  • Boards with a 3-digit display show 13.1, “Limit Lockout - switch open longer than 3 minutes in Main Limit circuit” 59TP6C-01SI, p. 56; IM-PG96VTAB-01, p. 54; 58SP0B-01SI, p. 30; II800SB-01, p. 31. On the Bryant 935SB it reads “Limit Lockout – switch opened in the limit circuit” II935SB-01, p. 48.
  • The 58SU0A has no code 13. An open main limit circuit is 4 red flashes, with a 3-hour lockout 58SU0A-05SI, p. 36.
  • The Infinity zone control lists furnace code 13; for 13 the system heats only with the heat pump, if there is one, until the code clears UIZ01-07SI, p. 20.

Related Carrier codes

  • 33 “LIMIT CIRCUIT FAULT”
  • 13.1 “Limit Lockout - switch open longer than 3 minutes in Main Limit circuit”
  • 26 “BURNER THERMAL SWITCH (BTS) open”
  • 4 red flashes “Main Limit Circuit Open”

See also

Other gas furnaces: Goodman, Lennox, Rheem and Ruud

All Carrier codes

Carrier is a trademark of its owner. How House Works is not affiliated with or endorsed by Carrier.

Sources

  1. Carrier Corporation. Owner's Manual, Condensing Gas Furnace. OM9GFRC-02, edition 04/20; replaces OM9GFRC-01. Accessed Oct 17, 2026.
  2. Carrier Corporation. Owner's Manual, Non-Condensing, 80% AFUE Gas Furnace. 80GSFRN-C-03OM, edition 08/22; replaces OM8GFRC-02. Accessed Oct 17, 2026.
  3. Carrier Corporation. SYSTXCCUIZ01--V Infinity Control (Zone), Installation Instructions. UIZ01-07SI, edition 05/12; replaces UIZ01-06SI. Manufacturer PDF hosted on shareddocs.com, not on the brand website.. Accessed Oct 17, 2026.
  4. Carrier Corporation. 58PAV, 58RAV Induced-Combustion Furnaces, Service and Maintenance Instructions, Sizes 045-155, Series 131. Form 58P,R-9SM (Catalog No. 535-835), edition 9-94; replaces 58P,R-8SM. Manufacturer PDF hosted on shareddocs.com, not on the brand website.. Accessed Oct 17, 2026.
  5. Carrier Corporation. 58MCB 4-Way Multipoise Fixed-Capacity Condensing Gas Furnace, Service and Maintenance Instructions, Sizes 040-120, Series 110 & 120. 58MCB-4SM, edition 10/09; replaces 58MCB-3SM. Manufacturer PDF hosted on shareddocs.com, not on the brand website.. Accessed Oct 17, 2026.
  6. Carrier Corporation. 58STA/STX Single-Stage Deluxe, Induced-Combustion 4-Way Multipoise Gas Furnace, Series 160. 58ST-24SI, edition 08/13; replaces 58ST-23SI. Manufacturer PDF hosted on shareddocs.com, not on the brand website.. Accessed Oct 17, 2026.
  7. Payne Heating & Cooling. PG8MAA/PG8JAA Series G: Single-Stage Deluxe, Induced-Combustion 4-Way Multipoise Gas Furnace. IM-PG8J-17, edition 08/13; replaces IM-PG8J-16. Manufacturer PDF hosted on shareddocs.com, not on the brand website.. Accessed Oct 17, 2026.
  8. Carrier Corporation. 58SC0A/58SC1A: 80% AFUE, Single-Stage, Multi-Speed ECM, 4-Way Multipoise, Non-Condensing Gas Furnace. 58SC0A-05SI REV B, edition 09/21; replaces 58SC0A-05SI REV A. Manufacturer PDF hosted on shareddocs.com, not on the brand website.. Accessed Oct 17, 2026.
  9. Carrier Corporation. 58SB0A/58SB1A: Single Stage, Multi-Speed ECM, Non-Condensing Gas Furnace, Input Capacities 45,000 thru 155,000 Btuh. 58SB0A-04SI, edition 03/20; replaces 58SB0A-03SI. Manufacturer PDF hosted on shareddocs.com, not on the brand website.. Accessed Oct 17, 2026.
  10. Bryant Heating & Cooling Systems. 810SA/811SA: 80% AFUE, Single-Stage, Multi-Speed ECM, 4-Way Multipoise, Non-Condensing Gas Furnace. II810SA-05 REV B, edition 09/21; replaces II810SA-05 REV A. Manufacturer PDF hosted on shareddocs.com, not on the brand website.. Accessed Oct 17, 2026.
  11. Payne Heating & Cooling. PG80ESAA/PG80ESLA: 80% AFUE, Single-Stage, Multi-Speed ECM, 4-Way Multipoise, Non-Condensing Gas Furnace. IM-PG80ESA-05 REV B, edition 08/21; replaces IM-PG80ESAA-05 REV A. Manufacturer PDF hosted on shareddocs.com, not on the brand website.. Accessed Oct 17, 2026.
  12. Payne Heating & Cooling. PG80ESAA/PG80ESLA: Single Stage, Multi-Speed ECM, Non-Condensing Gas Furnace, Input Capacities 45,000 thru 155,000 Btuh. IM-PG80ESAA-04, edition 03/20; replaces IM-PG80ESAA-03. Manufacturer PDF hosted on shareddocs.com, not on the brand website.. Accessed Oct 17, 2026.
  13. Bryant Heating & Cooling Systems. 820SA/821SA: 80% AFUE, Non-Communicating, Single Stage, ECM Motor, Variable Speed, 4-Way Multipoise, Non-Condensing Gas Furnace. II820SA-02 REV A, edition 08/21; replaces II820SA-02. Manufacturer PDF hosted on shareddocs.com, not on the brand website.. Accessed Oct 17, 2026.
  14. Carrier Corporation. 58TP0A/58TP1A Variable-Speed, ECM Induced-Combustion, 2-Stage 4-Way Multipoise, Non-Condensing Gas Furnace, Series A. 58TP0A-02SI, edition 07/19; replaces 58TP0A-01SI. Manufacturer PDF hosted on shareddocs.com, not on the brand website.. Accessed Oct 17, 2026.
  15. Carrier Corporation. 58TN0A/58TN1A: 80% AFUE, Two-Stage, Variable-Speed 4-Way Multipoise, Non-Condensing Gas Furnace, Series A. 58TN0A-02SI REV A, edition 08/21; replaces 58TN0A-02SI. Manufacturer PDF hosted on shareddocs.com, not on the brand website.. Accessed Oct 17, 2026.
  16. Bryant Heating & Cooling Systems. 880TA/881TA: 80% AFUE, Two-Stage, Variable-Speed 4-Way Multipoise, Non-Condensing Gas Furnace, Series A. II880TA-02 REV A, edition 08/21; replaces II880TA-02. Manufacturer PDF hosted on shareddocs.com, not on the brand website.. Accessed Oct 17, 2026.
  17. Carrier Corporation. 59SC2D Single Stage, 35-in. (889 mm) Tall 4-Way Multipoise Condensing Gas Furnace. 59SC2D-02SI, edition 11/19; replaces 59SC2D-01BSI. Manufacturer PDF hosted on shareddocs.com, not on the brand website.. Accessed Oct 17, 2026.
  18. Carrier Corporation. 59SC5A Single Stage 4-Way Multipoise Condensing Gas Furnace, Series 1 and 2. 59SC5A-13SI, edition 01/19; replaces 59SC5A-12SI. Manufacturer PDF hosted on shareddocs.com, not on the brand website.. Accessed Oct 17, 2026.
  19. Carrier Corporation. 59SP5A Single Stage, 4-Way Multipoise Condensing Gas Furnace, Series 1 and 2. 59SP5A-18SI, edition 01/19; replaces 59SP5A-17SI. Manufacturer PDF hosted on shareddocs.com, not on the brand website.. Accessed Oct 17, 2026.
  20. Carrier Corporation. 59SC5B: Single-Stage, High Efficiency, 4-Way Multipoise, 35-in. (889 mm), Condensing Gas Furnace. 59SC5B-04SI REV E, edition 06/23; replaces 59SC5B-04SI REV D. Manufacturer PDF hosted on shareddocs.com, not on the brand website.. Accessed Oct 17, 2026.
  21. Carrier Corporation. 59SP6A: Single-Stage, Non-Communicating, Variable-Speed, ECM Multipoise, Condensing Gas Furnace. 59SP6A-01SI REV D, edition 06/23; replaces 59SP6A-01SI REV C. Manufacturer PDF hosted on shareddocs.com, not on the brand website.. Accessed Oct 17, 2026.
  22. Carrier Corporation. 59TP6A Two-Stage Variable Speed ECM Multipoise Condensing Gas Furnace, Series 2, All Series 3 80-20, 100-20, 120-22. 59TP6A-10SI, edition 11/18; replaces 59TP6A-09SI. Manufacturer PDF hosted on shareddocs.com, not on the brand website.. Accessed Oct 17, 2026.
  23. Carrier Corporation. 59TP6B: Installation, Start-up, Operating and Service and Maintenance Instructions. 59TP6B-04SI REV D, edition 06/23; replaces 59TP6B-04SI REV C. Manufacturer PDF hosted on shareddocs.com, not on the brand website.. Accessed Oct 19, 2026.
  24. Payne Heating & Cooling. PG96VAT: Two-Stage 4-Way Multipoise Condensing Gas Furnace, Series B, All Series C, Sizes 60080, 60100, 66120. IM-PG96VAT-13, edition 11/18. Manufacturer PDF hosted on shareddocs.com, not on the brand website.. Accessed Oct 17, 2026.
  25. Carrier Corporation. 59TN6B: Two-Stage, Variable-Speed, Multipoise, 35 in. (889 mm) Tall, Condensing Gas Furnace. 59TN6B-01SI REV D, edition 06/23; replaces 59TN6B-01SI REV C. Manufacturer PDF hosted on shareddocs.com, not on the brand website.. Accessed Oct 17, 2026.
  26. Bryant Heating & Cooling Systems. 986TC: Two-Stage, Variable-Speed, Multipoise, 35 in. (889 mm) Tall, Condensing Gas Furnace. II986TC-01 REV D, edition 06/23; replaces II986TC-01 REV C. Manufacturer PDF hosted on shareddocs.com, not on the brand website.. Accessed Oct 17, 2026.
  27. Carrier Corporation. 59MN7B: Modulating, High Efficiency Condensing Gas Furnace, 4-Way Multipoise. 59MN7B-02SI REV D, edition 06/23; replaces 59MN7B-02SI REV C. Manufacturer PDF hosted on shareddocs.com, not on the brand website.. Accessed Oct 17, 2026.
  28. Carrier Corporation. 59SU5A: Up to 95% AFUE, Single-Stage, Upflow/Horizontal, Ultra Low NOx, 35-in. Tall, Condensing Gas Furnace (Minor Series 2). 59SU5A-05SI REV D, edition 06/23; replaces 59SU5A-05SI REV C. Manufacturer PDF hosted on shareddocs.com, not on the brand website.. Accessed Oct 17, 2026.
  29. Bryant Heating & Cooling Systems. 935SA: Up to 95% AFUE, Single-Stage, Upflow/Horizontal, Ultra Low NOx, 35-in. Tall, Condensing Gas Furnace (Minor Series B). II935SA-05 REV D, edition 06/23; replaces II935SA-05 REV C. Manufacturer PDF hosted on shareddocs.com, not on the brand website.. Accessed Oct 17, 2026.
  30. Carrier Corporation. 59CU5A: Single-Stage, Upflow/Horizontal Communicating, Variable Speed ECM, Ultra Low NOx, 35-in Tall Condensing Gas Furnace. 59CU5A-01SI REV D, edition 06/23; replaces 59CU5A-01SI REV C. Manufacturer PDF hosted on shareddocs.com, not on the brand website.. Accessed Oct 17, 2026.
  31. Carrier Corporation. 58SU0A 4-Way Multipoise, Ultra Low NOx 80% AFUE Gas Furnace, Input Capacities 40,000 thru 100,000 Btuh. 58SU0A-05SI, edition 11/19; replaces 58SU0A-04SI. Manufacturer PDF hosted on shareddocs.com, not on the brand website.. Accessed Oct 17, 2026.
  32. Payne Heating & Cooling. PG80ESU (Minor Series B&C) Troubleshooting Guide: 80% AFUE, Ultra Low NOx, 4-Way Multipoise Gas Furnace. GFULN80-G-01TS, edition 08/23. Manufacturer PDF hosted on shareddocs.com, not on the brand website.. Accessed Oct 17, 2026.
  33. Carrier Corporation. Troubleshooting Guide: Mid-Efficiency Variable-Speed, Two-Stage Induced-Combustion Deluxe, 4-Way Multipoise Gas Furnace. TG-GFC80-02, edition 05/18; replaces TG-GFC80-01. Manufacturer PDF hosted on shareddocs.com, not on the brand website.. Accessed Oct 17, 2026.
  34. Carrier Corporation. 59MN7A Series 100 Troubleshooting Guide: Variable Speed, Modulating Electronic Condensing Four-Way Multipoise Gas Furnace. Form 59MN7A-01T, edition 9-11. Manufacturer PDF hosted on shareddocs.com, not on the brand website.. Accessed Oct 19, 2026.
  35. Carrier Corporation. 58MVP Series 170 & 180, 58MVB, 58UVB Troubleshooting Guide: Variable Speed, Two-Stage Electronic Condensing Gas Furnace. Form 58-06T, edition 6-08; replaces 58MVP-10SM. Manufacturer PDF hosted on shareddocs.com, not on the brand website.. Accessed Oct 19, 2026.
  36. Carrier Corporation. 59TP6C: Two-Stage, Non-Communicating, Variable 25-Speed, ECM Multipoise, Condensing Gas Furnace with InteliSense. 59TP6C-01SI REV A, edition 06/23; replaces 59TP6C-01SI. Manufacturer PDF hosted on shareddocs.com, not on the brand website.. Accessed Oct 17, 2026.
  37. Payne Heating & Cooling. PG96VTAB: Two-Stage, Non-Communicating, Variable 25-Speed, ECM Multipoise, Condensing Gas Furnace. IM-PG96VTAB-01 REV A, edition 06/23; replaces IM-PG96VTAB-01. Manufacturer PDF hosted on shareddocs.com, not on the brand website.. Accessed Oct 17, 2026.
  38. Carrier Corporation. 58SP0B/58SP1B: 80% AFUE, Non-Communicating, Single Stage, Variable 25-Speed, ECM Motor, 4-Way Multipoise, Non-Condensing Gas Furnace with InteliSense. 58SP0B-01SI, edition 03/23. Manufacturer PDF hosted on shareddocs.com, not on the brand website.. Accessed Oct 17, 2026.
  39. Bryant Heating & Cooling Systems. 800SB/801SB: 80% AFUE, Single Stage, Multi-Speed ECM, 4-Way Multipoise, Non-Condensing Gas Furnace. II800SB-01 REV B, edition 06/23; replaces II800SB-01 REV A. Manufacturer PDF hosted on shareddocs.com, not on the brand website.. Accessed Oct 17, 2026.
  40. Bryant Heating & Cooling Systems. 935SB: Installation, Start-up, Operating and Service Maintenance Instructions (single-stage ultra low NOx condensing; 3-digit display). II935SB-01 REV C, edition 06/23; replaces II935SB-01 REV B. Manufacturer PDF hosted on shareddocs.com, not on the brand website.. Accessed Oct 19, 2026.