A. O. Smith · Error codes
A. O. Smith error codes and alerts
Identical code numbers can mean different things on different controllers, so every entry is tied to the documented series, controller and manual version. A code is never a diagnosis.
If you smell gas
- Stop what you are doing. Do not use phones, switches, matches or anything that can spark inside.
- Go outside and leave the door open behind you.
- Call the FortisBC 24-hour emergency line at 1-800-663-9911 or dial 911.
Only after that, call ROMA about the boiler. Official guidance: FortisBC gas leaks and odour.
A. O. Smith Burkay HW commercial copper boilers (LED flash codes, user manual 100077928 Tables 4-6)
Heartbeat
Normal Flame Signal. Next system action: not applicable. Recommended service action: not applicable. The table classifies it as Yellow LED f…
Lockout
2
Weak Flame Signal- System will operate reliably but flame signal is less than desired. NOTE: This indication may flash temporarily during or…
Lockout
1
Marginal Flame Signal (less than 1.1µA)- System may not operate reliably over time. Service call recommended. NOTE: This indication may flas…
Lockout
OFF
No Flame or Flame Signal below minimum threshold for system operation. Recommended service action: not applicable. The table classifies it a…
Lockout
OFF
No "Call for Heat". Next system action: not applicable. Recommended service action: none. The table classifies it as Green LED status code (…
Details
Flash Fast
Startup - Flame sense calibration. Next system action: not applicable. Recommended service action: none. The table classifies it as Green LE…
Details
Heartbeat
Normal operation. Next system action: not applicable. Recommended service action: none. The table classifies it as Green LED status code (co…
Details
2
5 minute Retry Delay • Pilot flame not detected during trial for ignition. Next system action: Initiate new trial for ignition after retry d…
Lockout
3
Recycle • Flame failed during run. Next system action: Initiate new trial for ignition. Flash code will remain through the ignition trial un…
Lockout
4
Flame sensed out of sequence. Next system action: If situation self corrects within 10 seconds, control returns to normal sequence. If flame…
Details
7
Flame sense leakage to ground. Next system action: Control remains in wait mode. When the fault corrects, control resumes normal operation a…
Details
8
Low secondary voltage supply- (below 15.5 Vac). Next system action: Control remains in wait mode. When the fault corrects, control resumes n…
Details
6+2
5 minute Retry Delay • On every third retry on the same "Call for Heat". Next system action: Initiate new trial for ignition after retry del…
Lockout
6+3
On every 6th flame failure during run on the same "Call for Heat". Next system action: 5 minute retry delay, then initiate new trial for ign…
Lockout
6+4
Flame sensed out of sequence- longer than 10 seconds. Next system action: Control waits until flame is no longer sensed and then goes to sof…
Details
ON
Soft lockout due to error detected during self check sequences. Next system action: Control auto resets from soft lockout after one hour. Re…
Details
OFF
No "Call for Heat". Next system action: not applicable. Recommended service action: none. The table classifies it as Green LED status code (…
Lockout
Flash Fast
Startup - Flame sense calibration. Next system action: not applicable. Recommended service action: none. The table classifies it as Green LE…
Lockout
Heartbeat
Normal operation. Next system action: not applicable. Recommended service action: none. The table classifies it as Green LED status code (lo…
Lockout
3
Recycle • Flame failed during run. Next system action: Initiate new trial for ignition. Flash code will remain through the ignition trial un…
Lockout
4
Flame sensed out of sequence. Next system action: If situation self corrects within 10 seconds, control returns to normal sequence. If flame…
Lockout
7
Flame sense leakage to ground. Next system action: Control remains in wait mode. When the fault corrects, control resumes normal operation a…
Lockout
8
Low secondary voltage supply- (below 15.5 Vac). Next system action: Control remains in wait mode. When the fault corrects, control resumes n…
Lockout
6+2
Failed trial for ignition resulting in lockout. Next system action: Remain in lockout until "Call for Heat" is cycled. Recommended service a…
Lockout
6+3
More than 5 flame failures during run on the same "Call for Heat" resulting in lockout. Next system action: Remain in lockout until "Call fo…
Lockout
6+4
Flame sensed out of sequence- longer than 10 seconds. Next system action: Control waits until flame is no longer sensed and then goes to sof…
Lockout
ON
Soft lockout due to error detected during self check sequences. Next system action: Control auto resets from soft lockout after one hour. Re…
Lockout
Talk to a boiler technician
Describe what the boiler is doing and get a straight answer about the next step.
On-site service in Greater Vancouver, BC. ROMA lists “Open 7 days” on its site; call to confirm same-day availability.