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TROUBLESHOOTING CHECKLIST
If the hood seems to be operating at high speed when the control is
not set on high, or if ventilation seems inadequate, check the fol-
lowing:
• Knockouts not removed from hood.
• Damper blade not opening.
• Reduced airflow because the duct is too small or the duct length
is too long.
• The duct is blocked.
• Undersized or restrictive wall or roof cap.
If the hood seems to make excessive noise:
• Fan may be hitting the filter. Turn off the fan and remove the fil-
ter. Bend the filter down slightly in the center (into a dome
shape) to allow fan clearance. Reinstall and adjust as needed.
The fan does not work but the lights do:
• Switch power off at the service panel and lock the service discon-
necting means to prevent power from being switched on acci-
dentally. When the service disconnecting means cannot be
locked, securely fasten a prominent warning device, such as a
tag, to the service panel.
• Check the wiring connections. See the CONNECT WIRING section
in these Installation Instructions.
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