12
Troubleshooting
Problem
Possible Cause
Solution
The fan seems louder than
it should.
The CFM is too great.
Be sure the CFM rating on the fan matches the square
footage of your room.
The damper is damaged or not working properly.
Check the damper to ensure it is opening and closing
properly. If the damper has become damaged, please call
Customer Service.
The bend in the duct is too close to the fan discharge.
Be sure you do not have any sharp bends in the duct closer
than 18 in. to the fan discharge.
The fan discharge is reduced to fit a smaller duct.
Use the recommended size ducting to reduce fan noise.
The fan body is not attached securely.
Be sure the fan is securely attached to the ceiling joists.
The fan is not clearing the
room.
There is insufficient airflow intake in the room.
Be sure a door or window is slightly ajar or opened to allow
airflow. The fan is not able to draw air out of the room without
enough airflow to draw from.
There is insufficient CFM.
Be sure the CFM rating on the fan matches the requirements
for your room size.
NOTE:
Using a tissue is not the correct method for
determining if the fan is operating properly. If the fan
clears steam from the room within approximately 15
minutes of completeing your shower, then the fan is
operating properly
.
The fan keeps running even
though the house humidity
level is lower than 60% RH.
Our sensor tolerance is +/-10% RH.
Continue to let fan run since it is good to keep venting the
house and the electric bill is minimal (approximately less
than $10 per year).
Outdoor humidity is back drafting into the fan.
Built-in 10 minute delay time after humidity level is
lower than 60% RH.
Turn the fan off when not in use.
