Specialist in revisie Ventilatiemotoren en WTW Onderdelen & advies Hulp bij merk en model Kenniscentrum Uitleg en praktische artikelen
Hulp nodig? Open Oploscentrum

We are on holiday until April 6. From April 7, we will resume processing messages and orders. Happy Easter.

Fläkt malfunction

Fläkt ventilation unit hums

Is your Fläkt ventilation unit or HRV unit humming? A humming sound often occurs due to worn bearings, a stiff motor, dirt accumulation, or resonance of the ventilation unit or ductwork.

Problem Humming sound
  • Constant hum
  • Vibrations or resonance
  • Motor overhaul often possible
Start troubleshooting

What do you notice?

  • A low hum from the ventilation unit.
  • The humming worsens at a higher ventilation setting.
  • Vibrations through the wall, ceiling, or ventilation ducts.
  • The motor still runs but sounds heavier than normal.

Possible causes

  • Worn bearings.
  • Imbalance of fan or motor.
  • Contamination of fan impeller or motor.
  • Resonance of the ventilation unit or ductwork.

When is overhaul possible?

If the humming is caused by wear and tear on the motor or bearings, an overhaul is often an excellent solution.

Choose the right solution

Fläkt motor overhaul View repairs → More about Fläkt overhaul View overhaul page →

Read more about Fläkt

Also check out our other information pages about Fläkt ventilation units, HRV units, parts, malfunctions, and overhauls.

Fläkt ventilation units Main page of the Fläkt knowledge center Mechanical ventilation units Information about mechanical ventilation units and overhaul HRV units Heat recovery and HRV systems Fläkt overhaul All about motor overhaul and repair Fläkt parts Motors, circuit boards, sensors, filters, and components Fläkt makes noise Sound, vibrations, and wear Fläkt hums Constant hum or resonance Fläkt no longer rotates Motor does not start or react Fläkt does not extract properly Poor extraction or moisture problems Fläkt bearings worn Grinding or squealing motor due to wear

Is your problem or model not listed?

Use our troubleshooting tool or parts finder. We are happy to help you find the right solution for your Fläkt ventilation system.

Start troubleshooting Find a part
Back to top
Customers rate us 4.9/5 based on 989 reviews.