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Glow Brand · Boiler troubleshooting

Re-lighting the unit

Glow Combi C95 & C140

What is going on

When one of these C95 or C140 boilers has gone out, most times it is a lockout after a missed light or a gas supply interruption, and the owner just wants it running. The re-light is manual and it has a purge-and-wait routine you should not skip. The five minute waits are there so any gas that collected can clear and you have time to smell it. If you ever smell gas, stop and find the leak instead of pushing on.

Likely causes

  • Burner went out after a failed ignition
  • Gas supply interrupted or tank ran low
  • Unit shut down for service and needs a restart
  • Power interruption that left the boiler locked out

Check in this order

  1. Set the CH setpoint to the lowest setting, then remove all power to the boiler.
  2. Turn the gas shut-off valve to OFF and remove the front cover.
  3. Wait five minutes, then check for gas including near the floor. If gas is smelled, stop and find the leak.
  4. Turn the gas valve ON, wait another five minutes, and check for gas again.
  5. Replace the front cover, set the CH setpoint to the highest setting, and apply power.
  6. Ignition is automatic after a brief fan purge, and it retries two more times if needed.
  7. If ignition does not occur, turn off gas and electricity and call a qualified gas service technician.
  8. Once running, set the CH setpoint back to where it was.

Applies to: C95 & C140

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Source: Glow Brand C95 & C140 installation & operation manual, p. 51-52. Written in our own words; check the manual for your exact model.

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.