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Duco malfunction

Duco ventilation unit not extracting properly

Is your Duco ventilation unit or HRV unit not extracting properly? Does moisture linger in the bathroom, do cooking odors disappear more slowly, or do you notice little air movement? The cause could be contamination, wear and tear, a motor problem, or a malfunction in the control system.

Problem Poor extraction
  • Little air movement
  • Moisture lingers
  • Motor overhaul possible
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What do you notice?

  • Little extraction in the bathroom, kitchen, or toilet.
  • Moisture remains longer after showering.
  • Cooking odors disappear less quickly.
  • The ventilation unit is running, but moving little air.

Possible causes

  • Contaminated valves or ventilation ducts.
  • Worn motor or bearings.
  • Problems with the control system or operation.
  • Contaminated fan or impeller.

What can you check yourself?

Check if the vents are clean and if the ventilation unit responds when you select a different ventilation setting. For an HRV unit, also check the filters. If the extraction remains insufficient, the cause may lie in the ventilation motor or fan.

Not sure where the problem lies?

Use our troubleshooting guide. It will help you determine step by step why your Duco ventilation system is extracting less effectively.

Start the troubleshooter

When is an overhaul necessary?

When the ventilation unit has been thoroughly cleaned but the extraction remains insufficient, wear and tear on the motor or bearings may be the cause. In many cases, an overhaul is a cost-effective alternative to replacement.

Choose the right solution

First check for malfunction Start troubleshooter → Duco motor overhaul View repairs →

Read more about Duco

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

Duco ventilation units Main page of the Duco knowledge center Mechanical ventilation units DucoBox Silent, Focus, Reno and motor overhaul HRV units DucoBox Energy Comfort, Premium and Sky Duco overhaul Everything about motor overhaul and repair Duco parts Motors, circuit boards, sensors, filters and parts Duco is noisy Sound, vibrations and wear Duco hums Constant hum or resonance Duco no longer spins Motor does not start or does not respond Duco does not extract properly Little extraction or moisture problems Duco bearings worn Grinding or screeching motor due to wear

Is your problem or model not listed?

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

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