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Troubleshooting
Problem: Smoke blows away before reaching the bottom of the hood.
Are there pass-thru windows near
the hood?
Is this an air curtain hood?
Is the make-up air part of the hood
or an attached plenum?
Problem: Pilot lights are being blown out or cooking equipment is being cooled by make-up air.
Are there drafts from make-up air?
Problem: Cold air can be felt by the cook at the hood.
Is this a short circuit hood?
Is this an air curtain hood?
Is the make-up air part of the hood
or an attached plenum?
Problem: The kitchen gets hot.
Is the hood capturing?
Is this an air curtain hood?
Is the make-up air part of the hood
or an attached plenum?
Problem: Cooking odors in the dining area.
Is the hood capturing?
Is there a draft through doors between
the kitchen and dining area?
Problem: Grease is running off the hood.
Is there grease on top of the hood?
Is the caulk missing or damaged?
Is the grease cup inserted properly?
Problem: Hood is noisy.
Is the fan running in the correct direction? See exhaust fan troubleshooting section.
Are the filters in place?
Is the hood over exhausting?
Adjust amount and locations of make-up air to eliminate drafts
through the pass-thru windows.
Turn off or reduce the amount of make-up air.
Try turning off or reducing the amount of make-up air; block off
portions of the supply to direct air away from the problem area (test
with cardboard).
Try turning off or reducing the amount of make-up air; block off
portions of the supply to direct air away from the problem area (test
with cardboard first); remove any obstructions in front of supply that
directs air toward cooking equipment.
Turn off or reduce the amount of air supplied to short circuit.
Turn off or reduce the amount of air supplied to the air curtain; heat
the supply air.
Try turning off or reducing the amount of make-up air; heat the
supply air.
Hood is not drawing enough air, see sections above on fan
performance and hood capture.
Turn off or reduce the amount of air supplied to the air curtain.
Try turning off or reducing the amount of make-up air; cool the
supply air.
Hood is not drawing enough air, see sections above on fan
performance and hood capture.
Decrease make-up air in the kitchen; increase exhaust air through
hood.
Exhaust duct is not correctly welded.
Clean problem area and re-caulk.
Put grease cup back in place.
Replace missing filters.
Slow down fan (see exhaust fan troubleshooting section)
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