HVACopediaGlow Brand · Boiler · Ignition
Ignition and retry
What happens, in order
- Heat demand starts the combustion fan; a brief fan purge runs first
- Ignition control opens the gas valve and sparks; flame is proven with the flame sensor
- If flame is not proven the control retries ignition 2 more times (3 attempts total)
- Three failed attempts give lockout Loc 1 (ignition error)
- Loc 1 and Loc 2 are hard lockouts; cycling power does not clear them, hold RESET on the display to clear
- If flame is lost during normal running the boiler locks out on flame failure
Timings and thresholds
| Item | Value |
|---|---|
| Ignition attempts | 3 total (1 + 2 retries) |
| Fan fault lockout (Loc 5/6/7) | fan speed wrong for more than 60 s |
Codes you may see during this
Applies to: B85, B120, B160
Models
B85B120B160
More Glow Brand boiler sequences
- Power-up and de-air · Startup
- Central heat call and post purge · Heating
- Indirect tank call and priority · Domestic hot water
- Anti-frost pre-heat · Freeze protection
- Anti-legionella cycle · Other
Take it to the job
Sequences of operation, error codes and tips work offline in the HVACopedia app.
Source: Glow Brand B85/B120/B160 Installation and Operating Manual (sections 10.2, 11.7, 11.8, 11.10, 12.1). Written in our own words; timings can differ by model and software version, so check the manual for your exact unit.
For licensed technicians. Gas, electrical and refrigerant work must be done by a qualified, licensed person. Shut off power and gas before servicing, never bypass a safety control, and follow the manufacturer’s manual for the exact model; it and local codes always take priority. HVACopedia is not affiliated with any manufacturer; brand and model names only identify the equipment.