Carrier/Bryant Fault Codes
LED Flash Codes
| Flashes | Meaning | Action |
|---|---|---|
| 1 flash | System lockout (retries exceeded) | Reset power, check ignition |
| 2 flashes | Pressure switch stuck closed | Check inducer, pressure switch |
| 3 flashes | Pressure switch stuck open | Check venting, inducer, hose |
| 4 flashes | Open high limit | Check airflow, filter, blower |
| 5 flashes | Flame sensed without gas valve | Check gas valve, flame sensor |
| 6 flashes | 115V power reversed or no ground | Check electrical connections |
| 7 flashes | Low flame signal | Clean flame sensor |
| 8 flashes | Ignitor failure | Check/replace ignitor |
Trane/American Standard Codes
XL/XV Series LED Codes
| Flashes | Meaning |
|---|---|
| 1 red | System lockout - call for heat not completed |
| 2 red | System lockout - recycle limit exceeded |
| 3 red | Induced draft blower fault |
| 4 red | Open high temperature limit |
| 5 red | Flame sense without gas valve |
| Alternating | Gas valve circuit failure |
| Continuous ON | Control board failure |
| Continuous OFF | 24V power failure |
Lennox Codes
SLP/EL Series
| Code | Meaning |
|---|---|
| E225 | Rollout switch open |
| E227 | Limit switch open |
| E228 | Flame not sensed during trial |
| E250 | Inducer motor fault |
| E251 | Pressure switch stuck open |
| E270 | Low flame signal |
| E290 | Indoor blower motor fault |
Goodman/Amana Codes
Common LED Codes
| Flashes | Meaning |
|---|---|
| 1 flash | Lockout due to no ignition |
| 2 flashes | Pressure switch stuck closed |
| 3 flashes | Pressure switch stuck open |
| 4 flashes | Limit switch open |
| 5 flashes | Flame sensed with gas valve off |
| 6 flashes | Voltage issue |
| 7 flashes | Low flame microamps |
| 9 flashes | Reversed line voltage polarity |
Pro Tip: Always photograph the diagnostic label inside the furnace door. It has the specific code chart for that model, which can vary by age and series.
Parts for Any Code
NOLT stocks ignitors, flame sensors, pressure switches, and control boards for fast repairs.
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