Top 7 Common Problems with Automatic Urinal Sensors & How to Fix Them

Automatic urinal sensors make commercial washrooms more hygienic, water-efficient, and easier to maintain. But like any electronic plumbing system, they are susceptible to problems if installation, cleaning, or maintenance is neglected.

Here are 7 common automatic urinal sensor problems and practical ways to fix them.

1. Sensor Is Not Detecting the User

Problem: The sensor does not activate when someone stands in front of the urinal.

Fix: Wipe the sensor window clean first and check for dirt, water spots, stickers, or obstructions. If the sensor is battery operated, check the battery voltage. Also check that the sensor is at the right height and distance from the user.

Practical tip: Avoid installing the sensor directly opposite highly reflective surfaces, as they can sometimes affect detection.

2. Urinal Keeps Flushing Automatically

Problem: The urinal flushes repeatedly even when nobody is using it.

Fix: Verify that the sensor is not seeing false reflections from a nearby wall, mirror, glossy surface/object. If the problem persists, clean the sensor face and check the wiring and control unit.

3. No Water Comes Out During Flushing

Problem: The sensor detects the user, but there is no water flow.

Fix: Check the water supply, isolation valve, and solenoid valve. A blocked filter or inlet can also restrict water flow. For battery-operated systems, confirm that the battery has sufficient power to operate the valve.

4. Flush Is Too Weak

Problem: Water comes out, but the urinal does not clean properly.

Fix: Check the inlet pressure and clean the valve filter. Mineral deposits can also restrict the water passage, especially in areas with hard water.

Field tip: Regular filter cleaning can prevent many flushing complaints before they become major problems.

5. Sensor Flushes Too Late or Too Early

Problem: The flush timing does not match actual usage.

Fix: Check the sensor's detection range and programmed flushing delay. Some models allow adjustment of detection distance or flushing time. Incorrect installation distance can also affect performance.

6. Battery Drains Too Quickly

Problem: The sensor works normally but requires frequent battery replacement.

Fix: Check for continuous false detection, incorrect sensor settings, or a solenoid valve that is drawing excessive power. Using good-quality alkaline batteries is important for battery-operated urinal sensors.

7. Sensor Works, but the Solenoid Valve Does Not

Problem: The sensor activates, but the valve does not open.

Fix: Inspect the electrical connection between the sensor and valve. Check the valve coil, power supply, and wiring. If the coil is damaged or the valve is clogged, cleaning or replacement may be required.

Final Takeaway

The most common automatic urinal sensor problems are dirty sensor windows, incorrect installation, blocked valves, low water pressure, battery issues, or wiring problems. Reliability can work wonders with regular cleaning and preventive maintenance.

If you are using the automatic urinal sensor for commercial purposes, then make sure to go with the serviceable and repairable one. Bharat Photon offers sensor-based urinal flushing systems for commercial washrooms where reliability and maintenance are key concerns.