Grant Boilerhouse fault 3
Flame slow to stabilise during start up
Oil boilerWhat it means
Flame takes an extended time to stabilise when the burner starts, indicating combustion or draught issues.
Likely causes
- Insufficient air supply
- Poor condition of the fan
- Inadequate room ventilation
- Incorrect nozzle size and type
- Fuel pressure too low
- Insufficient draught
- Dirty boiler heat exchanger
- Poor condition of flue
- Debris, leaves, hair, fluff accumulation in air inlet cover and air damper
- Debris accumulation on fan impeller and fan housing
- Contamination in oil pump filter
- Debris or blockage accumulation in trap over time
Where to start
- Check the air damper setting and the condition of the fan
- Check room ventilation is adequate, see Section 9.1
- Check the nozzle size and type
The full answer, free
- 69 more checks in order
- The readings and component tests from the manual
- How to put it right, step by step
- The manual page for this fault (page 46), right under the answer
Safety: Isolate oil and power before you touch the burner. Do a combustion test after any burner adjustment or part change. OFTEC (or equivalent) work only.
From the Grant manual for the Boilerhouse. Check the model on the data plate before you order parts.