Hand Dryer Troubleshooting

Updated April 17, 2017

Hand dryers are primarily used in public places, such as restaurants, schools and hospitals. They are appealing to own because they reduce the amount of paper waste and are more environmentally friendly. In addition, the lack of physical contact with the machine can reduce the spread of germs. As with any electrical appliance, however, you may eventually experience some difficulties. Save yourself or your business by trying to troubleshoot the issues yourself.

Sensor's Detection Zone

If you find that no air is supplied when your hands are placed in front of the sensor's detection zone, remove the cover and check the LED indicator light on the power board. If the light is not lit, power is not being supplied to the dryer. Check the main power supply and all electrical connections. If the green LED light illuminates and then turns red when your hands are placed under the beam, either the blower motor is not connected properly, the power board has failed or the blower motor has failed.


When you place your hands under the sensor beam, if only unheated hair is supplied, chances are the heater is not properly connected. Check all the heater leads for a secure connection. If this is not the problem, the heater assembly may be defective and you'll need to replace it.

Air Cycles

If your air cycles intermittently on and off, your sensor is probably blocked or out of position. Clear any obstructions and ensure that the sensor is properly positioned in the exhaust grille. Your range may also be too long, so reduce it. If none of these solve your problem, your sensor may have failed and needs to be replaced.

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About the Author

Kelly Seiler has been a freelance writer and editor in Texas for the past 10 years. She grades essays on national standardized tests and writes reports on service received at local restaurants and businesses. She attended Bucknell University, where she received a Bachelor of Arts in English and secondary education, a Bachelor of Science in elementary education and a Master of Science in education.