Troubleshooting a Touchless Faucet

Updated on April 6, 2019

Touchless faucets utilize automated faucet controls to provide hands-free activation. Besides their sleek and contemporary style, touchless faucets can reduce water consumption by people who tend to leave the faucet running needlessly between water-related tasks.

In addition, automated water control is a more sanitary option than touching the faucet handles with dirt-and-germ-laden hands. However, these water-saving, convenient, and grime-reducing instruments are also susceptible to problems that do not occur with regular faucets. Below are four common touchless faucet issues.

No Flashing Light or Water

If the LED sensor light does not flash and there is no water coming out of the faucet, it is possible that the batteries were not installed properly. Remove the battery box cover and examine the batteries to see if they were inserted in the direction specified in the instructions. If so, firmly push the batteries down to ensure they have been fully inserted and are touching the contacts. Finally, check the valve control to determine if the connection from the battery box is secure.

Flashing Light but No Water

If the LED sensor does flash but there is no water coming from the faucet, the batteries may need replacing. On some touchless faucet models, the light will flash five times every four seconds to indicate that the batteries are low, so replacing them is the first step. However, a flashing light may also indicate that there is a short in the sensor or the sensor wire.

Cautiously remove the black sensor wire from the washer and touch it with your finger. This should produce a water flow, which ceases when you stop touching the wire. If so, the problem is with the cover plate installation and the spout. If not, there is either a grounding issue or the sensor wire may be broken.

Slow Water Flow

If the faucet has a slow water flow, the water supply valve may not be fully open, and if so, merely adjust the valve. It is possible that the aerator is clogged, and removing and cleaning it will restore normal water flow. The solenoid filter may also be clogged. However, if removing and cleaning it does not solve the problem, you may need a replacement solenoid filter kit.

Leaky Faucet

If water drips from the faucet when the activation cycle is over, the dial may need adjusting, or there may be dirt or some other valve obstruction. Turn the dial to the auto position and then activate the water several times until the leaks stop.

However, if this does not work, turn off the water to the valves, and remove the aerator from the bottom of the faucet; then remove the dirt filter and clean it. Reinsert the filter, but leave the aerator off while you turn the water back on. Activate the sensor several times to flush out any remaining dirt, and when the water flows cleanly, reattach the aerator.

This article is accurate and true to the best of the author’s knowledge. Content is for informational or entertainment purposes only and does not substitute for personal counsel or professional advice in business, financial, legal, or technical matters.

Questions & Answers

  • Why did my touchless faucet's sensor quit working?

    There could be several reasons why your touchless faucet stopped working. For example, the cable underneath may be loose. Or the solenoid may have stopped working.

  • There is no red light, nor is there water coming from my hardwired touchless faucet system. All power sources are ok. What can be the problem?

    A cable underneath the sink may be loose. Otherwise, the solenoid may need to be replaced.

  • How do I turn off the touchless function?

    The sensor should detect your hand movements and automatically turn the faucet off when you move away from the sink.

  • How do you get the touchless faucet to remain running?

    It depends on the make and model, but there should be a level on the side that you can adjust to make the water stay on.


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    • profile image

      Ronald Santos 

      19 months ago

      How you determined the solenoid or the sensor of the faucet is defective it the battery drained very past. every time i replaced the battery its working after a several days not working again indicated from the sensor have red means battery low.

    • profile image


      19 months ago

      How you determined the solenoid or the sensor of the faucet is defective it the battery drained very past. every time i replaced the battery its working after a several days not working again indicated from the sensor have red means battery low.

    • profile image


      2 years ago

      If there is a short do I need a new faucet or can I did it


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