Step-by-step fix
Step 1: Confirm the control box is the likely problem
- Make sure the faucet has normal water supply by checking that the under-sink shutoff valves are open.
- Check the faucet's power source under the sink and confirm batteries are fresh or the power pack is plugged in, if your faucet uses one.
- Look for simple issues first, like a loose battery pack, unplugged wire, or a wet connector under the sink.
- If the faucet still has no touch response, erratic touch response, or only works intermittently after those basic checks, the control box is a reasonable replacement target.
If it works: You have ruled out the most common easy causes and the control box still looks like the failed part.
If it doesn’t: If the faucet starts working after restoring power, drying a connector, or tightening a loose plug, you may not need to replace the control box.
Stop if:- There is active leaking under the sink from the faucet body, supply lines, or shutoff valves.
- Wiring is burned, melted, or badly corroded.
- The faucet has no water flow at all from either manual or touch operation, which may point to a different problem.
Step 2: Shut down power and prepare the work area
- Clear out the cabinet so you can reach the faucet connections comfortably.
- Place a towel and shallow pan under the control box area to catch drips.
- Turn off the faucet's power source by removing the batteries or unplugging the power pack.
- Close the hot and cold shutoff valves under the sink if the control box connects into the water path on your setup.
- Open the faucet to relieve any remaining pressure, then close it.
If it works: The cabinet is clear, the faucet is de-energized, and the area is ready for a clean swap.
If it doesn’t: If a shutoff valve will not close fully, keep the pan in place and be ready for extra drips while you work.
Stop if:- A shutoff valve leaks from the stem or body when you turn it.
- The cabinet has standing water, mold, or damaged wood that makes the area unsafe to work in.
Step 3: Document and disconnect the old control box
- Take clear photos of every wire and hose connected to the control box before removing anything.
- Label connections if needed so you can move them one by one to the new box.
- Disconnect the power lead, touch sensor lead, solenoid lead, and any other plug-in connectors attached to the box.
- Disconnect any water line connections attached to the control box, keeping the pan underneath for drips.
- Release the old box from its mounting clip, bracket, or hook-and-loop pad and remove it from the cabinet.
If it works: The old control box is out and you have a clear record of how everything was connected.
If it doesn’t: If a connector is stubborn, check for a locking tab before pulling harder.
Stop if:- A connector will not release without forcing it and you risk breaking the mating plug.
- You find cracked hoses, damaged O-rings, or corrosion severe enough that replacing only the control box will not be enough.
Step 4: Install the new touch faucet control box
- Compare the new control box to the old one and make sure the ports and plug locations match your faucet setup.
- Mount the new box in the same general position as the old one, keeping it off the cabinet floor if possible.
- Reconnect each wire and hose one at a time, matching your labels or photos.
- Push electrical plugs in fully until they feel seated, and hand-tighten water connections before snugging them if needed.
- Keep wires routed neatly so they do not rub on sharp edges or get pinched by stored items under the sink.
If it works: The new control box is mounted securely and all connections are back in place.
If it doesn’t: If a plug or hose does not match the new box, pause and recheck part fit before going further.
Stop if:- The replacement box does not match the original connection layout closely enough to install safely.
- A water fitting will not thread smoothly by hand, which can mean cross-threading.
Step 5: Restore service and check for leaks
- Slowly reopen the shutoff valves if you closed them earlier.
- Restore power by reinstalling batteries or plugging the power pack back in.
- Watch the control box and all nearby connections for several minutes while the system pressurizes.
- Dry each fitting with a towel and check again for fresh moisture.
- If your faucet has a normal startup or calibration behavior, let it finish before testing touch operation.
If it works: The faucet is powered back up and the area under the sink stays dry.
If it doesn’t: If you see a small drip, turn the water back off and reseat or gently snug that connection before testing again.
Stop if:- A connection leaks steadily or sprays water.
- The control box gets unusually hot, smells burnt, or shows obvious electrical trouble.
Step 6: Test the faucet in normal use
- Run the faucet with the handle in its usual operating position and test the touch function several times.
- Try turning water on and off by touch from different spots on the spout or handle where it normally responds.
- Let the faucet run for a minute, then stop and start it again to check for consistent response.
- Recheck under the sink after testing to make sure no slow leak has appeared around the new control box or its connections.
If it works: The faucet responds normally to touch and stays dry under the sink during real use.
If it doesn’t: If the faucet still does not respond correctly, recheck every connector, confirm the power source is good, and verify you installed the correct replacement part.
Stop if:- The faucet still has the same symptoms after the new box is installed and all connections are confirmed.
- Touch operation is inconsistent because the faucet body, sensor wiring, or another component appears damaged.
Replacement Parts
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FAQ
Do I need to shut off the water to replace a touch faucet control box?
Usually yes if the control box is connected into the faucet's water path. If your setup only uses electrical plug connections, you may not need to shut off water, but it is still smart to be ready for drips.
How do I know the control box is bad and not just the batteries?
Start with fresh batteries or a confirmed good power source, then check for loose or wet connectors. If power and water are both present and the faucet still has no touch response or very erratic response, the control box becomes a stronger suspect.
Can I replace the control box without removing the whole faucet?
In many cases, yes. The control box is usually mounted under the sink and can be swapped there without pulling the faucet from the countertop.
What if the new control box does not match the old one exactly?
Do not try to adapt mismatched plugs or fittings. Recheck the replacement against your exact faucet so the ports, connectors, and mounting style line up correctly.
Why is my touch faucet still not working after I replaced the control box?
A loose connector, weak power source, damaged sensor wire, failed solenoid, or a different faucet problem can cause the same symptoms. Go back through each connection and confirm the replacement part is the correct fit.