Itho CVE ECO making noise? Causes and solutions

The Itho CVE ECO has been one of the most widely used mechanical ventilation units in the Netherlands for years. The system is known for being reliable and energy-efficient. Nevertheless, even an Itho CVE ECO can start producing more noise after years of use.

Do you hear a humming, squeaking, or vibrating sound coming from your ventilation unit? Then it's wise to investigate the cause before the problem worsens.

Which noises are most common?

Owners of an Itho CVE ECO often report:

humming sound
squeaking sound
grinding sound
vibrations in the home
increasing noise at higher ventilation settings

When the noise gradually gets worse, wear and tear is often the cause.

Possible cause 1: Worn bearings or motor mounts

The most common cause of a noisy Itho CVE ECO is worn bearings or broken motor mounts.

The bearings ensure that the motor shaft can rotate smoothly. After years of use, wear occurs, leading to:

humming noises
increased vibrations
the motor running heavier
an increase in noise level

This often starts with a slight hum that slowly becomes more audible.

Broken motor mounts are easily visible as the motor will be loose in the motor plate.

Possible cause 2: Fan contamination

Dust, grease, and dirt can accumulate in the ventilation unit over the years.

This can cause:

the fan to become unbalanced
additional resistance
the motor to be put under heavier load
more noise to be produced

Regular maintenance helps to mitigate these problems.

Possible cause 3: Fan impeller imbalance

If the fan impeller is damaged or dirty, an imbalance can occur.

This often causes:

vibrations
humming noises
resonance in pipes or walls

The sooner this is addressed, the lower the chance of further wear.

Possible cause 4: Aged components

Many Itho CVE ECO units have been in use for years now.

Although the casing is often still in excellent condition, internal components may show wear.

This leads to decreased performance and can cause malfunctions or noises.

What can you check yourself?

Before you consider repair or overhaul, you can check a few things:

Clean any filters.
Check the ventilation unit for contamination.
Check if the ventilation unit is securely mounted.
Listen if the sound is coming from the motor.
Check if air ducts are securely attached.

If the noise persists, motor wear is often the cause.

When is overhaul advisable?

Overhaul is often beneficial when:

the ventilation unit otherwise functions well
only the motor shows wear
replacement is relatively expensive
you want to extend the lifespan

During an overhaul, worn parts are replaced, and the motor is checked and tested.

Overhaul or replacement?

For many Itho CVE ECO systems, overhaul is an excellent alternative to full replacement.

When the casing and other components are still in good condition, overhaul can provide:

less noise
better performance
longer lifespan
lower costs than replacement

Ventilation Service Center is happy to help

Ventilation Service Center specializes in the overhaul, repair, and replacement of ventilation motors.

Is your Itho CVE ECO making more noise than usual? Based on the type and the complaint, we can often quickly indicate which solution is most suitable.