Step-by-step fix
Step 1: Confirm the solenoid is the likely problem
- Check that the faucet has normal water supply to the sink and that the shutoff valves under the sink are open.
- Make sure the touch faucet power source is connected and any batteries are fresh if your faucet uses them.
- Try the faucet more than once. A bad solenoid often shows up as no water flow, water that will not shut off, or clicking without normal valve action.
- Look under the sink for obvious leaks, corrosion, or damaged wiring around the control box and solenoid.
If it works: You have ruled out a simple power or supply issue and the solenoid still looks like the most likely failed part.
If it doesn’t: If the faucet starts working after restoring power, replacing batteries, or opening the shutoff valves, you likely do not need to replace the solenoid.
Stop if:- There is active leaking from multiple components and you cannot tell where it starts.
- The cabinet area has burned wiring, melted plastic, or signs of overheating.
- The faucet problem clearly points to a different failed part, such as a broken hose or damaged control module.
Step 2: Shut off water and set up the work area
- Clear out the space under the sink so you can reach the faucet connections comfortably.
- Turn off both sink shutoff valves.
- Open the faucet to relieve pressure and let any remaining water drain out.
- Place a bucket or shallow pan under the solenoid area and keep towels nearby.
If it works: The water is off, pressure is relieved, and the area is ready for a controlled disconnect.
If it doesn’t: If a shutoff valve will not close fully, stop using the faucet and close the main water supply before continuing.
Stop if:- A shutoff valve starts leaking from the stem or body when you turn it.
- You cannot stop water flow enough to disconnect the lines safely.
Step 3: Remove the old touch faucet solenoid
- Use a flashlight to identify the solenoid under the sink. It is usually installed inline between the water supply and the faucet hose and connected to the touch system wiring.
- Take a quick photo of the hose routing, wire plugs, and flow direction before disconnecting anything.
- Unplug the electrical connector or connectors attached to the solenoid.
- Loosen the water line connections carefully and let the remaining water drain into the bucket.
- Release any mounting clip, bracket, or fastener holding the solenoid in place, then remove the old part.
If it works: The old solenoid is out and you have a clear reference for how the new one needs to go back in.
If it doesn’t: If a fitting is stuck, support the connected tubing and work slowly so you do not twist or crack another part.
Stop if:- A supply tube, faucet hose, or connector cracks while being loosened.
- You find heavy corrosion, split hoses, or damaged fittings that will keep the new solenoid from sealing properly.
Step 4: Install the new solenoid in the same orientation
- Compare the new solenoid to the old one and make sure the ports, connectors, and overall layout match.
- Check for any flow arrow or inlet and outlet markings on the new part and position it the same way as the original.
- Attach the solenoid to its bracket or mounting point first if that makes the hose connections easier.
- Reconnect the water lines by hand to avoid cross-threading, then snug them with a wrench without overtightening.
- Plug the electrical connector or connectors back in fully so they seat securely.
If it works: The new solenoid is mounted, connected in the correct direction, and all fittings are snug and aligned.
If it doesn’t: If the new part does not match the old one closely enough to install without forcing anything, pause and verify you have the correct replacement.
Stop if:- The replacement part will not connect cleanly to the existing hoses or wiring.
- Threads will not start by hand, which can mean a mismatch or cross-threading risk.
Step 5: Restore water and check for leaks first
- Turn the shutoff valves back on slowly while watching the solenoid and nearby connections.
- Leave the faucet off at first and inspect each fitting for drips.
- Wipe every connection dry with a towel, then check again after a minute so small leaks are easier to spot.
- Tighten only the leaking connection slightly if needed, then recheck.
If it works: Water is back on and the new solenoid and fittings stay dry under pressure.
If it doesn’t: If a connection still drips after a careful slight retightening, shut the water back off and reseat that connection.
Stop if:- A fitting sprays, will not seal, or the leak appears to come from a cracked hose or damaged valve body.
- Water is leaking into electrical connectors or the control box area.
Step 6: Test touch operation in real use
- Use the faucet normally and trigger the touch function several times.
- Check that water turns on and off when expected and that flow is steady.
- Run both hot and cold water if your faucet setup allows it, and watch underneath while the faucet is operating.
- Come back after a few minutes and check again for slow drips around the new solenoid and its connections.
If it works: The faucet responds normally to touch, water flow is controlled correctly, and the repair stays dry during real use.
If it doesn’t: If the faucet still does not respond correctly, recheck the power source, wire connections, and part fit. If those are correct, the problem may be elsewhere in the touch control system.
Stop if:- The faucet will not shut off reliably after installation.
- The touch system behaves erratically and you have confirmed the new solenoid is installed correctly.
- Any leak returns during use.
Replacement Parts
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FAQ
What does a touch faucet solenoid do?
It is the valve that opens and closes water flow when the touch system sends a signal. If it fails, the faucet may stop responding, stay on, or click without normal water control.
How do I know the solenoid is bad and not the batteries or power supply?
Check the easy items first. Make sure the faucet has power, any batteries are fresh, and the water supply valves are open. If power and supply are good but the faucet still will not control water properly, the solenoid becomes a stronger suspect.
Do I need to shut off the main water supply?
Usually no. The sink shutoff valves are normally enough for this repair. If one will not close fully or starts leaking, then shut off the main water before continuing.
Can I reuse the old hoses and fittings?
Usually yes, if they are in good shape and the new solenoid is the correct match. Do not reuse damaged hoses or force worn fittings to seal.
What if the new solenoid does not fix the faucet?
Then the problem may be in the power source, wiring, touch control module, or another faucet component. Recheck every connection and confirm the replacement part matches your faucet exactly before moving on to deeper diagnosis.