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MAINTENANCE & TROUBLESHOOTING
Make sure the appropriate circuit breaker(s) at the homes' electrical panel are turned OFF before servicing your
whole house fan product(s).
Verify the fan assembly is securely mounted and straps are not wearing prematurely. Repair and replace as appli-
cable.
Blocking of fan exhaust can cause it to fail prematurely and/or reduce the amount of air the fan can move. Keep the
area in front of the fan exhaust unobstructed. No object should be closer than 24 inches to the face of the fan grille.
This fan has been factory tested. If problems are encountered, please take a few moments to run through the fol-
lowing troubleshooting procedures before calling for assistance:
• If the fan does not turn on and wall control (WTT) display is blank, check power to the unit and the
verify that fan power cord is plugged in to active 115VAC outlet.
• If the damper doors fl ap during operation, verify that appropriate windows are open in the home and that
there is enough attic exhaust free space available. Either or both conditions will reduce whole house fan
performance air fl ow.
• If the damper doors do not open or close, visually inspect the damper for any debris obstructing their
movement. Inspect fan exhaust for obstruction.
• If Wall Control (WTT) display does not lite up. Verify fan power cord is plugged in to active 115VAC outlet.
Verify 50 foot plug&play cable is completely plugged into Splitter Module, and the Splitter Module is plugged
in to fan control module and "red" RJ connector on back side of wall control device.
• The Wall Control (WTT) display indicates ON but the fan is not running. If ON is blinking and the WTT is in
Temperature Control mode, make sure the Set To Temperature is a few degrees lower than indoor temperature.
ON will blink when the fan is running.
• Fan is running but damper doors are not opening. If you feel some air but not a lot of air where the damper
doors open slightly, verify that both fan assemblies are operating. Check outlet power to both fan
assemblies. Check that splitter module is installed on fan assembly and verify P&P cables are connected to
WTT and daisy chained to 2nd fan assembly.
• The Wall Control (WTT) only allows for 1 or 3 speed operation and your system is a 2 speed system. Refer to
Step 6 Set the Number of Fan Speeds in the INSTALLATION: WIRING AND CONTROL section to change number
of fan speeds of the wall control (WTT) device.
If the suggestions above do not work, contact Field Controls technical support at 800.742.8368 or by email
at fi eldtec@fi eldcontrols.com for further assistance. Technical manuals are available on our website at
www.fi eldcontrols.com.
P/N 780104100 07/20 Rev B
page 16 of 20
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