Troubleshooting
15
TROUBLESHOOTING PROCEDURES
Issue
Cause
What to do
After installation,
the unit doesn’t
work.
1. The power source is not turned ON.
1. Make sure the circuit breaker and the unit’s
power is ON.
2. The power line and the cable locking connector
is not connecting properly.
2. Check the power connection with the unit is
connected properly.
3. The switch board and control board wirings are
disconnected.
3. Make sure the wirings between the switch
board and control board are connected
properly.
4. On the switch board, Black/White wire or White
wire is disconnected.
4. Make sure the Black/White wire or White wire
connects properly.
5. The switch board or control board is defective.
5. Change the switch board or control board.
Light works,
but motor is not
turning.
1. The blower is defective, possible seized.
1. Change the blower.
2. The thermally protected system detects if the
motor is too hot to operate and shuts the motor
down.
2. The motor will function properly after the
thermally protected system cool down.
3. Damaged capacitor.
3. Change the capacitor.
The unit is
vibrating.
1. The blower is not secure in place.
1. Tighten the blower in place.
2. Damaged blower wheel.
2. Change the blower.
3. The hood is not secured in place.
3. Check the installation of the hood.
The motor is
working, but the
lights are not.
1. Defective halogen bulb.
1. Change the halogen bulb.
2. The light bulb is loose.
2. Tighten the light bulb.
The hood is
not venting out
properly.
1. The hood might be hanging to high from the
cook top.
1. Adjust the distance between the cook top and
the bottom of the hood within 26” to 34” range.
2. The wind from the opened windows or opened
doors in the surrounding area are affecting the
ventilation of the hood.
2. Close all the windows and doors to eliminate
the outside wind flow.
3. Blocking in the duct opening or duct work.
3. Remove all the blocking from the duct work or
duct opening.
4. The direction of duct opening is against the wind. 4. Adjust the duct opening direction.
5. Using the wrong size of ducting.
5. Change the ducting to at least 6” or higher.
Metal filter is
vibrating.
1. Metal filter is loose.
1. Change the metal filter.
2. Spring clip is broken.
2. Change the spring clip.
Summary of Contents for MH80120AS
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