Mechanical ventilation ensures the continuous extraction of moist and polluted air from homes and buildings, day and night. Because a ventilation system operates almost continuously, malfunctions can occur over time.
Some problems are easy to solve. Other complaints indicate wear and tear of components and require revision or repair.
In this article, we discuss the most common ventilation malfunctions.
Malfunction 1: Ventilation makes a humming sound
A humming sound is one of the most common complaints.
Possible causes:
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worn bearings
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contamination of the fan
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imbalance of the fan wheel
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vibrations in air ducts
Often the sound slowly worsens as wear increases.
Also read:
My mechanical ventilation makes a humming sound
Malfunction 2: Fan no longer rotates
When a fan completely stops, it can have several causes.
Common causes:
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power problem
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defective ventilation motor
-
defective electronics
-
blockages due to contamination
It is wise to first check the power supply before taking further steps.
Also read:
Fan no longer rotates: causes and solutions
Malfunction 3: Fan squeaks
A squeaking sound often indicates wear of moving parts.
Common causes:
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worn bearings
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drying out of components
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wear of motor components
When a squeaking sound persists for a long time, further damage can occur.
Malfunction 4: Fan vibrates
Vibrations can lead to additional noise nuisance and accelerated wear.
Possible causes:
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contaminated fan
-
damaged fan wheel
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imbalance
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loose fasteners
It is important to have vibrations investigated in a timely manner.
Malfunction 5: Reduced ventilation capacity
Sometimes the ventilation unit still operates, but less air is extracted.
Possible causes:
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contaminated fan
-
clogged air ducts
-
wear of the motor
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defective control
This can lead to moisture problems and a poorer indoor climate.
Malfunction 6: Fan starts with difficulty
A fan that has difficulty starting may indicate:
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wear of bearings
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defective capacitor
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motor problems
This is often an early sign that maintenance or overhaul is needed.
Malfunction 7: Recurring malfunctions
When the same malfunction recurs regularly, it is advisable to have further investigation carried out.
Recurring problems often indicate:
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wear of components
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outdated components
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structural defects
A sustainable solution prevents unnecessary repetitions of the same complaint.
When is overhaul advisable?
Overhaul can be interesting when:
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the ventilation unit otherwise functions well
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only the motor shows wear
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replacement is relatively expensive
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you want to extend the lifespan
By replacing worn components, a ventilation system can often function reliably again for years.
Which brands experience these malfunctions?
The mentioned malfunctions occur, among others, in ventilation units from:
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Itho Daalderop
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Zehnder
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Orcon
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Duco
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Buva
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Vasco
For many models, overhaul is an excellent alternative to complete replacement.
Ventilation Service Center is happy to help
Ventilation Service Center specializes in the overhaul, repair, and replacement of ventilation motors and ventilation units.
Are you experiencing a malfunction? Based on the brand, type, and complaint, we can often quickly determine the most suitable solution.
Frequently asked questions
What is the most common ventilation malfunction?
A humming sound due to wear of bearings is very common.
Should I take immediate action in case of a malfunction?
Yes. Early signals such as humming or squeaking can indicate wear that later leads to failure.
Is overhaul cheaper than replacement?
In many cases, yes. This depends on the technical condition of the ventilation unit.
Which brands can be overhauled?
Among others, Itho Daalderop, Zehnder, Orcon, Duco, Buva, and Vasco.
Links
DucoBox maintenance and overhaul
Common ventilation malfunctions and solutions
When should you overhaul a ventilation unit?
Overhaul or replace ventilation unit?
How long does a mechanical ventilation unit last?
Zehnder Comfofan makes a humming sound?
Stork CML or CMLe makes noise?
Vasco ventilation makes noise?