Installation Guide
12
TROUBLESHOOTING
PROBLEM POSSIBLE CAUSE CORRECTIVE ACTION
The fan seems louder 
than it should
CFM too great
Be sure the CFM rating on the fan matches 
the size of your room
Damper not working properly or damaged
Check damper to ensure it is opening and 
closing properly. If the damper has become 
damaged, please call Customer Service
Bend in duct too close to fan discharge
Be sure you do not have any sharp bends in 
duct closer than 18 in. to the fan discharge
Fan discharge reduced to t smaller duct
Use recommended size ducting to reduce fan 
noise
Fan housing not securely attached
Be sure the fan is securely attached 
to your ceiling joists
The fan is not 
clearing the room
Insufcient intake airow within room
Be sure a door or window is slightly ajar or 
opened to allow airow. The fan is not able  
to draw air out of the room without enough 
airow to draw from
Insufcient CFM
Be sure the CFM rating on the fan matches the 
requirements for your room size
NOTE: Using a tissue is not an accurate 
method for determining if the fan is operating 
properly. If the fan clears steam from the room  
within approximately 15 minutes of completing 
your shower, then the fan is operating properly
CARE AND MAINTENANCE
WARNING: Disconnect power supply before servicing. See SAFETY INFORMATION before proceeding. 
Routine maintenance should be done at least once a year.
• Wash grille with mild soap and water, dry with a cloth.
• Remove excess dirt and dust from the fan housing with a vacuum cleaner.
• Do not use solvents, thinner or harsh chemicals for cleaning the fan.
• Do not allow water to enter the motor.
• Do not immerse resin parts in water over 140º F.
HUMIDITY SENSING OPERATION
3.   Fan Off: 
Move the wall on/off switch to the “OFF” position.
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