What to do if your hand dryers not working
Has the hand dryer you have had for a few years suddenly stopped working?
Here is our quick troubleshooting guide to help you get the hand dryer you have in your facility working again. If you still require advice, please do not hesitate to contact us using the details at the bottom of this post.
Help my hand dryer’s stopped working (FULL VIDEO)
The full video above is broken down into smaller sections in the playlist “Help my hand dryer has stopped working” series which can be found here https://www.youtube.com/playlist?list=PLK0XVAPI82UQks1O8DNvGQoMuo6ho8qAX
The video series gives you a useful guide of what to check to get your hand dryer up and running again.
The parts of the full video can be found here:
- Consult the Manual https://youtu.be/Av5ZC-W61Dc
- Check Power Supply and Fuse https://youtu.be/jnD-c_6TqBw
- Check the Sensor https://youtu.be/V7e894MQqwU
- Air Outlet https://youtu.be/cqts8Njk0_A
- Is the Inside Clean? https://youtu.be/qofohUNPTjw
- Carbon Brushes https://youtu.be/DuNgjH-wgSk
- HEPA or General Filter https://youtu.be/6ttqPBlOdIg
- No Heat https://youtu.be/GNiQOXWTUFo
- Check the Circuit Board https://youtu.be/EY85LHEpPS8
There are very few things that can go wrong with most electric hand dryers. Many modern electric hand dryers no longer have a heater element, so they have become even simpler to diagnose. Anyone opening the cover of a hand dryer to conduct work on the electric components should be a trained professional. Ideally you should consult the trouble shooting guide in the user’s manual, however if this is not available here are a few of the potential issues that may occur with your electric hand dryer. The power to the hand dryer must be isolated and turned off before removing the cover.
The Hand Dryer is not blowing or the performance has reduced?
Depending on the age and type of motor the hand dryer has there are a few likely causes.
On a brush motor hand dryer (majority of hand dryers) that has been in use for some time, the 2 brushes that hold the rotator will gradually ware. Even on a low cost unit this should not occur until the electric hand dryer has performed at least 100,000 cycles, so if it is relatively new or in a low use area this is less likely to be the fault.
Check when the electric hand dryer was installed and check with the supplier what the expected brush life is, in order to eliminate this as a likely cause. More simply you will be able to visually detect if the brushes are worn because the connection with the rotator will be slight or their will be no connection at all. It is also worth checking or replacing the springs that hold the brushes in place.
The good news is that a set of brushes are relatively cheap to buy and simple to change.
If the unit is new, it maybe that dust or debris has got into the machine and is inhibiting the performance. On brush motors, when the winding (copper coil) gathers dust the electrical connection will not be as good therefore the motor may be intermittent. Dust around any moving parts will inhibit the performance of the machine so please consult the supplier about the correct way to clean the internals of the hand dryer. You may also want to check the filter (if your hand dryer has one) is clear of debris, this is a common issue with high speed hand dryers as they suck more dust into the units and often have HEPA or anti-bacterial filters. Filters protect the motor but performance will be dimished if filters are left to gather debris.
Digital brushless motors have less maintenance issues but are affected even more my dust, so it is vital that they are cleaned in accordance with guidelines.
The hand dryer is making a rattling sound?
Potentially this could be the springs on the brush motor, if these are not at the correct tension they may move about as the motor rotates. Other than that components may have come loose and the unit needs thoroughly checking.
The Hand Dryer has no heat coming out?
Many modern hand dryers rely on the speed of the airflow as opposed to evaporation to dry hands. Some of these hand dryers have the option of heated airflow or unheated airflow, as the unheated versions are far more energy efficient. So firstly check whether the hand dryer has a heater element. If it does not, the the dryer will only give off heat when it is in regular use.
Secondly, if heat is desired and there is a heater element, there may be a switch under the unit or on the circuit board that allows the heat to be activated or deactivated.
Thirdly, check the connection between the heater element and circuit board as it may have come loose and check that there is power to the heater element. If it is none of these things, you may need to obtain a new heater element from the supplier.
I put my hands under the dryer but nothing happens, yet there is power to the hand dryer?
This is most likely either a connectivity problem between the sensor and the circuit board or the sensor is faulty. First check the connection and clean the sensor. If this does not work replace the sensor. If still not working, check the power from the circuit board to the sensor
Circuit board issues
If you look at the hand dryer circuit board and there are signs that a component may have suffered damage then this may also link with the issue you are having depending on the function of the component in question. You can try changing the circuit board.
We hope you found this helpful, we have a team of qualified engineers who can visit your site to diagnose problems and can also carry out maintenance checks to ensure the smooth operation of your hand dryer.
Alternatively if it is a new hand dryer you are requiring, please do not hesitate to contact one of our experts for the best advice in the industry. Also view our website here.
For more information or for help in finding your ideal hand dryer or washroom product, please call us UK offices: North: 0114 3540047 South: 0203 3270448; Eire office: +353 19036387, use our contact us page by clicking here or click to visit the website. You can also use our Intelligent Search Tool that helps you identify the perfect dryer for your location by clicking here.
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