BRYANT DIAGNOSTIC REFERENCE 14 VERIFIED CODES
Bryant furnace error codes
Find your light pattern below. Every entry is verified against official service literature — no guesswork, no generic tables. Bryant shares the Carrier control platform; the codes below apply to the equivalent Bryant models.
Status LED — short + long flash codes
Series: 58STA · 58STX · Bryant 310/311/312 series · Payne PG8M series
| Pattern | Meaning | Severity |
|---|---|---|
| Status LED Off — No Power | Try DIY first, then call a pro | |
| Rapid Flashing — Reversed 115V Polarity | Professional repair | |
| Code 11 — No Previous Fault Stored | Info — not a fault | |
| Code 12 — Blower-On After Power-Up | Info — not a fault | |
| Code 13 — Limit Circuit Lockout | Try DIY first, then call a pro | |
| Code 14 — Ignition Lockout | Try DIY first, then call a pro | |
| Code 21 — Gas Heating Lockout (No Auto-Reset) | Professional repair | |
| Code 22 — Abnormal Flame-Proving Signal | Safety issue — act now | |
| Code 23 — Pressure Switch Did Not Open | Professional repair | |
| Code 24 — Secondary Voltage Fuse Open | Try DIY first, then call a pro | |
| Code 31 — Pressure Switch Did Not Close or Reopened | Try DIY first, then call a pro | |
| Code 33 — Limit Circuit Fault | Try DIY first, then call a pro | |
| Code 34 — Ignition Proving Failure | DIY-friendly fix | |
| Code 45 — Control Circuitry Lockout | Professional repair |
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