My central exhaust unit (ULV, USV, USVX) is noisy – what can I do?

If a central exhaust unit of type ULV, USV or USVX is making noise, this is usually because the fan is dirty. The fan should be cleaned at least once a year.

Start by unplugging the unit from the dedicated socket so that the fan is completely disconnected from the power supply. The connection box is attached with Velcro and should be carefully detached from the fan side.

Next, loosen the four mounting screws on the round motor plate. The entire fan can now be pulled straight out of the fan housing by holding the square connection box.

The fan unit can be taken to the kitchen or laundry room for cleaning. Use a non-water-based degreasing agent together with a small scraper or brush to remove stubborn dirt from the fan wheel. Be careful not to damage or deform the fan wheel, and make sure that no liquid enters the motor itself.

Allow the fan to dry completely before carefully reinstalling it in the reverse order.