No light, no click, no water
The faucet acts completely dead when you wave your hand in front of it.
Start here: Start with the battery pack, AC adapter if present, and under-sink wire connections.
Touchless faucet troubleshooting
Motion Faucet Not Working
Direct answer: If a motion faucet is not working, the most common causes are dead batteries, a loose power connection, a dirty sensor window, or closed under-sink shutoff valves. Start there before assuming the faucet itself has failed.
Most likely: On most homeowner calls, the fix is restoring power to the faucet or cleaning the sensor area so it can actually see your hands.
First separate the symptom: no water at all, sensor light but no flow, weak flow, or water that runs only sometimes. That tells you whether you are chasing power, sensing, water supply, or a clogged outlet. Reality check: touchless faucets fail dead more often from simple battery or connection issues than from major internal damage. Common wrong move: replacing the faucet when the shutoff valves under the sink are partly closed or the aerator is packed with debris.
Don’t start with: Do not start by buying a whole new faucet or tearing apart the spout. Most no-response problems are outside the waterway, not a bad faucet body.
No response at allCheck batteries, power pack, and any loose plug under the sink first.
Sensor reacts but flow is weak or absentCheck the shutoff valves and clean the faucet aerator before buying parts.
Last reviewed: 2026-04-05
What the faucet is doing
Sensor seems alive but no water comes out
You may hear a faint click or see an indicator light, but the spout stays dry.
Start here: Check both faucet shutoff valves under the sink and make sure supply hoses are not kinked.
Water comes out weakly or in a thin stream
The faucet turns on, but flow is much lower than normal.
Start here: Remove and clean the faucet aerator, then retest before digging deeper.
Works sometimes, then quits
The faucet responds off and on, or only after several tries.
Start here: Clean the sensor window, secure the wiring, and look for low battery behavior.
Most likely causes
1. Dead batteries or lost power to the faucet control
A touchless faucet that is completely unresponsive usually is not getting power. Battery packs under the sink are the first thing to fail.
Quick check: Open the battery box, look for corrosion or weak batteries, and reseat every plug you can reach by hand.
2. Dirty or blocked sensor window
Soap film, hard-water haze, or a towel hanging in front of the sensor can keep the faucet from seeing your hands correctly.
Quick check: Wipe the sensor area with a soft damp cloth and remove anything stored directly in front of the faucet.
3. Closed shutoff valve or restricted water flow
If the faucet seems to activate but little or no water comes out, the problem is often supply-side, not electronic.
Quick check: Make sure both under-sink shutoff valves are fully open and the faucet aerator is not clogged with grit.
4. Failed faucet solenoid valve or faucet control module
When power is present, the sensor area is clean, the shutoffs are open, and the faucet still will not open water, the internal control parts become the likely failure.
Quick check: After the basic checks, listen for a click at the valve area under the sink and look for secure wiring with no corrosion.
Step-by-step fix
Step 1: Confirm whether the faucet is dead or just not passing water
You need to know whether the problem is power and sensing, or water supply and flow. That keeps you from chasing the wrong side of the faucet.
- Wave your hand in the normal sensing area and watch for any indicator light, click, or brief valve sound.
- Try both hot and cold settings if your faucet has a temperature handle or mixing lever.
- Check whether nearby faucets at the same sink or room have normal water pressure.
- Look under the sink for anything obviously unplugged, hanging loose, or recently bumped by stored items.
Next move: If the faucet shows some sign of life, move to water supply and flow checks next. If there is no light, no click, and no response at all, treat it as a power or control issue first.
What to conclude: A completely dead faucet usually points to batteries, wiring, or the control module. A reacting faucet with no flow points more toward shutoffs, aerator blockage, or the solenoid valve.
Stop if:
- You see active leaking under the sink.
- A wire connection is wet, corroded, or burned.
- The cabinet area is too cramped to work safely without forcing parts.
Step 2: Restore power and clean the sensor area
Low power and dirty sensors are the most common, least-destructive fixes on touchless faucets.
- Open the battery compartment and replace all batteries as a full set if the faucet uses them.
- Check for battery corrosion, moisture, or loose contacts in the battery box.
- If the faucet uses an AC adapter, make sure it is firmly plugged in and the outlet has power.
- Unplug and reconnect the low-voltage plugs under the sink one at a time so they seat fully.
- Wipe the sensor window and spout area with a soft cloth dampened with warm water and a little mild soap if needed, then dry it.
- Remove any soap bottle, sponge caddy, towel, or decorative item sitting directly in front of the sensor path.
Next move: If the faucet starts responding normally, you likely had a power or sensor-visibility problem. If the faucet is still dead after fresh power and a clean sensor area, keep going to rule out a water-side issue and then suspect the control parts.
What to conclude: A faucet that wakes up after new batteries or reseated plugs usually does not need deeper repair. One that stays dead may have a failed faucet control module or a bad solenoid circuit.
Step 3: Check the shutoff valves and supply hoses under the sink
A touchless faucet can sense your hand perfectly and still deliver no water if the supply is shut down or pinched off.
- Locate the hot and cold shutoff valves under the sink and make sure both are fully open.
- Turn each valve gently only by hand. Do not force a stuck valve.
- Look for kinked, crushed, or sharply bent faucet supply hoses.
- If one side of the faucet has been weak for a while, compare hot and cold response to see whether the problem is only on one supply side.
- After confirming the valves are open, test the faucet again.
Next move: If water returns, the faucet itself was not the main problem. If the faucet reacts but still gives little or no water, check the outlet restriction next.
Step 4: Clean the faucet aerator and retest flow
Mineral buildup and debris at the faucet tip can make a working touchless faucet look dead or weak, especially after plumbing work or a water interruption.
- Unscrew the faucet aerator from the spout by hand or with a cloth for grip if needed.
- Rinse out grit and soak the aerator briefly in warm water if scale is light.
- Use a soft brush or toothpick gently to clear the screen openings without deforming them.
- Reinstall the faucet aerator and test the faucet again.
- If the faucet flows better with the aerator removed, the restriction was at the outlet.
Next move: If normal flow returns, you are done. Keep the old aerator only if it cleaned up fully and seals well. If the faucet still has power and open shutoffs but will not pass water, the internal valve or control side is the likely fault.
Step 5: Decide whether the faucet needs an internal repair part or a pro
Once power, sensor visibility, shutoffs, and aerator blockage are ruled out, the remaining likely failures are the faucet solenoid valve or faucet control module.
- Listen under the sink while activating the faucet. A repeated click with no water can point to a stuck or failed faucet solenoid valve.
- If there is still no response at all with confirmed power, suspect the faucet control module or sensor circuit.
- Inspect the under-sink faucet electronics for corrosion, water drips, or damaged connectors.
- Replace only the confirmed failed faucet-specific part if your model supports serviceable parts and you can match fitment exactly.
- If parts are not clearly serviceable, wiring is damaged, or the faucet has multiple symptoms, call a plumber or the manufacturer support line with the faucet information in hand.
A good result: If the faucet runs normally after the correct part is replaced, cycle it several times and check under the sink for leaks or loose wiring.
If not: If a confirmed part replacement does not restore operation, stop spending money on guesses and move to professional diagnosis or full faucet replacement only after fitment is confirmed.
What to conclude: At this point the easy causes are off the table. The fault is usually in the faucet solenoid valve, faucet control module, or less commonly a model-specific sensor assembly.
Replacement Parts
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FAQ
Why did my motion faucet stop working all of a sudden?
The sudden-stop version is usually power related. Dead batteries, a loose plug under the sink, or a tripped adapter connection are more common than a failed faucet body.
Can a clogged aerator make a touchless faucet seem broken?
Yes. If the faucet is sensing your hand but the stream is weak or missing, a packed faucet aerator can make it look like the whole unit failed.
How do I know if it is the sensor or the solenoid valve?
If the faucet shows no response at all after fresh power and a clean sensor area, suspect the control or sensor side. If it reacts but still will not pass water with open shutoffs, the touchless faucet solenoid valve is the stronger suspect.
Should I replace the whole faucet if the touchless feature quits?
Not first. Check power, sensor cleanliness, shutoff valves, and the faucet aerator before replacing anything major. Whole faucet replacement makes sense only after the serviceable parts are ruled out or unavailable.
Why does my motion faucet work sometimes and then stop?
Intermittent operation usually points to weak batteries, a loose under-sink connector, a dirty sensor window, or something sitting in the sensor path. Those are the first things to correct before buying parts.
Can low water pressure in the house cause this?
Yes, but compare with nearby faucets first. If other fixtures are also weak, the problem may not be the touchless faucet at all.