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Troubleshooting
DANGER:
Turn off the power circuit breaker or the power switch on the junction box before performing maintenance .
Touching circuitry inside the range hood while it is energized may result in serious injury or death .
Problem
The range hood does not operate .
The range hood vibrates when the fan is operating .
The fans seem weak .
The lights work, but the fan is not spinning, is stuck,
or is rattling .
The range hood is not venting properly .
A light does not work .
QR072 / QR074
Solution
- Check that the power supply cable and all electrical wiring are properly
connected .
- Check that the power is turned on at the junction box or circuit breaker .
- Check that the wiring between the switch control and the control board are
connected properly .
- Check that the range hood has been secured properly . Tighten into position, if
necessary .
- Check that the motor is secured in place . If not, then tighten the motor in place .
- Check that the fan is not damaged . If so, replace the fan .
- Check that the duct size used is at least 177 mm (7 in) round . The range hood
will not function efficiently with insufficient duct size.
- Check that the duct is not clogged with debris and the tight mesh on the wall
cap, if applicable, isn't restricting air flow.
- Check that the damper unit is opening properly .
- Check that no birds or animals have nested in the duct .
- The thermal protection system detects if the motor is too hot to operate and
shuts the motor down . In this case, the motor will function properly after the
thermal protection system cools down (after approximately 10 min) .
- Check that the fan isn't jammed or scraping the bottom .
- If nothing else works, the motor may be defective or seized . If so, replace the
motor .
- Check that no birds or animals have nested in the duct .
- Check that the distance between the cooktop and the bottom of the range hood
is between 458 mm (18 in) and 710 mm (28 in) .
- Check that duct work follows all requirements . Use round metal duct work with
a uniform diameter of 177 mm (7 in) . The length of duct work must not exceed
35 ft (10 .7 m) . Reduce the length of duct work and the number of elbows if
necessary . Ensure that all joints are properly connected, sealed, and taped .
- Check that the duct does not open against the wind .
- Ensure that the power is on high speed for heavy cooking .
- Close all windows nearest to the range hood to eliminate sudden air gusts .
- To enhance the performance of the range hood, open slightly a window on the
opposite side of the house where the range hood vents outdoors .
- Check to see if light bulb is burnt . If so, replace .
- Check the light bulb to see if it is loose . If so, tighten .
- Remove the problem bulb and insert one you know is working . If the properly
functioning light does not come on, the problem may be the light assembly .
Have the light assembly serviced or replaced .
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