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Vasco malfunction

Vasco ventilation unit makes noise

Does your Vasco ventilation unit, HRU, or ventilation motor make more noise than usual? A humming, grinding, rattling, or whining sound often indicates wear, contamination, imbalance, or a motor that is no longer running smoothly.

Problem Makes noise
  • Humming or grinding sound
  • Vibrations or resonance
  • Motor overhaul often possible
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What do you notice?

  • The ventilation unit makes more noise than before.
  • You hear a humming, grinding, rattling, or whining sound.
  • The noise increases at a higher ventilation setting.
  • The unit vibrates or resonates through walls, ceilings, or ducts.

Possible causes

  • Worn bearings or rotating parts.
  • Contamination of fan or motor.
  • Imbalance of the fan wheel.
  • Wear of motor or mounting rubbers.

What can you check yourself?

Listen carefully to the type of sound and check if the sound changes at a different ventilation setting. Always disconnect the power to the ventilation unit before opening or inspecting it.

Are you unsure about the cause?

Use our troubleshooter to determine step by step why your Vasco ventilation system is making noise.

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When is an overhaul possible?

When the noise is caused by wear to the motor or bearings, an overhaul is often an excellent solution. This means the complete ventilation unit usually does not need to be replaced.

Choose the right solution

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

Read more about Vasco

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

Vasco ventilation units Main page of the Vasco knowledge center Mechanical ventilation units Mechanical ventilation units and motor overhaul HRUs Heat recovery, motors, and repair Vasco overhaul Everything about motor overhaul and repair Vasco parts Motors, circuit boards, capacitors, and other parts Vasco makes noise Sound, vibrations, and wear Vasco hums Constant humming or resonance Vasco doesn't run anymore Motor does not start or respond Vasco doesn't extract well Low extraction or moisture problems Vasco bearings worn Grinding or whining motor due to wear

Is your problem or model not listed?

Use our troubleshooter or part finder. We are happy to help you find the right solution for your Vasco ventilation system.

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