10
Model:
VFB080D4H1
TROUBLESHOOTING
PROBLEM
POSSIBLE CAUSE
CORRECTIVE ACTION
The fan is not turning on
1. Power off
2. Faulty switch
3. Faulty wire connection
1. Make sure power supply is on.
2. Test or replace switch.
3. Check wire in switch box.
The fan seems louder
than it should
1. CFM too great
2. Damper not working
properly or damaged
3. Bend in duct too close
to fan discharge
4. Fan discharge
duct
5. Fan body not securely
attached
1. Be sure the CFM rating on the fan matches the
size of your room.
2. Check damper to ensure it is opening and closing
properly. If the damper has become damaged,
please call Customer Service.
3. Be sure you do not have any sharp bends in duct
closer than 18 in. to the fan discharge.
4. Use recommended size ducting to reduce fan
noise.
5. Be sure the fan is securely attached to your ceiling
joists.
The fan is not clearing
the room
1.
airfow within room
2.
1. Be sure a door or window is slightly ajar or opened
2. Be sure the CFM rating on the fan matches the
requirements for your room size.
The fan keeps running
even though the house
humidity level is lower
than 60% RH
1. Our sensor tolerance
is +/-10% RH
2. Outdoor humidity is
back drafting to the
fan
3. Indoor temperature
level
1. Continue to let the fan run since it is good to keep
venting the house and the electric bill is minimal
(approximately less than $10 per year).
2. Turn the fan off when not in use.
