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Napoleon · Gas fireplace troubleshooting

Blower noisy, vibrating or rattling

What is going on

Fireplace convection blower makes noise.

Likely causes

  • Speed switch out of calibration
  • Running on high
  • Dirty fins
  • Drywall dust in bearings
  • Loose mounting
  • No vibration pad
  • Wires touching fins

Check in this order

  1. Noisy on low recalibrate the variable speed switch - meter on the blower terminals, switch on 'low', turn calibration screw until it reads 93 volts.
  2. Noisy on high lower the speed.
  3. Clean the fins with a duster, brush or vacuum.
  4. After drywall/construction work, dust may be in the bearings - clean or replace the blower.
  5. Vibrating tighten blower screws and wingnut; install a vibration pad if the installation instructions call for one.
  6. Ticking/rattling secure harness wires or debris away from the fins.

Applies to: Napoleon gas fireplaces - direct vent, natural vent and vent-free (general service manual)

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Source: Napoleon (Wolf Steel) Service Manual W415-0118, Part 4 Other Issues, Blower Flowchart, p.29. 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.