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Charles BishopAug 27, 2025
What causes the flames to be too large or too small in my Napoleon BGD40-N?
- AAmanda DixonAug 27, 2025
If the flames of your Napoleon Indoor Fireplace are consistently too large or too small, it could be due to several reasons: You might be out of propane gas, so fill the tank. The spark gap might be incorrect, so ensure it's between 0.150” to 0.175” (5/32” to 11/64” approx.) from the electrode tip and the pilot burner. There might be no gas at the pilot burner, so check that the manual valve is turned on, check the pilot orifice for blockage, or replace the valve. The unit might be over-fired or under-fired, so check pressure readings.