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Carrier 58CVA / 58CVX Furnace Codes
Similar two-digit status codes are used on many Carrier, Bryant and Payne furnaces of the same era, but titles and causes vary by model. Check the service label on the blower door.
| Code | Meaning | What to check |
|---|---|---|
| 11 | No previous code. | |
| 12 | Blower on after power up. | |
| 13 | Limit circuit lockout. | A limit or rollout switch stayed open. Usually airflow; rollout needs a heat exchanger and vent check. How to fix → |
| 14 | Ignition lockout. | Failed to light after repeated tries: gas supply, igniter, flame sensor, gas valve. How to fix → |
| 15 | Blower motor lockout. | |
| 21 | Gas heating lockout. | |
| 22 | Abnormal flame-proving signal. | Flame sensed when the gas valve should be off. How to fix → |
| 23 | Pressure switch did not open. | How to fix → |
| 24 | Secondary voltage fuse is open. | Short in the 24 VAC wiring, thermostat or outdoor unit wiring. How to fix → |
| 25 | Model selection or setup error. | |
| 31 | High-heat pressure switch or relay did not close or reopened. | Vent and intake blockage, hoses, inducer, condensate. How to fix → |
| 32 | Low-heat pressure switch did not close or reopened. | Vent and intake blockage, hoses, inducer, condensate. How to fix → |
| 33 | Limit circuit fault. | A limit opened briefly. If open more than 3 minutes it becomes code 13. How to fix → |
| 34 | Ignition-proving failure. | Weak flame signal: clean the flame sensor, check ground and gas pressure. How to fix → |
| 41 | Blower motor fault. | |
| 43 | Low-heat pressure switch open while high-heat pressure switch is closed. | How to fix → |
| 45 | Control circuitry lockout. |
How to read the codes
- Two-digit codes: the first digit is a series of short flashes and the second a series of long flashes. For example, 3 short then 1 long = code 31.
- LED continuously on: the control has 24 VAC. Continuously off: no 24 VAC to the control. Rapid flashing: 115 VAC polarity reversed (or transformers out of phase on twinned units).
- Code recall on this series: disconnect the R thermostat lead, reset power and set switch SW1-1 to ON; stored codes flash in order, ending with code 11.
Codes point to a circuit, not a part. Test before replacing anything, and never jumper a limit, rollout or pressure switch to keep a furnace running. Gas and line-voltage work is for trained technicians.
Source: Carrier 58CVA/58CVX Troubleshooting Guide, 58-5T (Catalog 535-80107). The "meaning" column follows the manufacturer's wording; "what to check" is our field summary. Always go by the label on the furnace you're working on.
Related
- How to read furnace LED flash codes
- Furnace pressure switch troubleshooting
- Flame sensor microamps and cleaning
Other brands
- Lennox Merit ML180UH (80% single-stage)
- Rheem / Ruud R96V / 96MDV (96% two-stage communicating)
- Goodman / Amana GR9S80 / GD9S80 (80% single-stage)
- Trane / American Standard S9X1 / S9X2 / S9B1 (96% condensing)
- Lennox SL280UHV (80% two-stage variable speed)
- Goodman / Amana / Daikin GM9S96 / GC9S96 / GM9S92 (96% and 92% condensing, single-stage)
- Carrier 59TP6C two-stage condensing with InteliSense (Performance series)
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