A purifier that's gone completely silent is alarming, but not every "RO not working" case needs a technician visit. A few checks take under two minutes and rule out the simplest causes first — the ones that don't need any tools.

1. Check the power at the source, not just the unit

Confirm the wall socket is actually live — plug in another device to test it. RO units draw very little power, so a partially faulty socket can sometimes power the display lights but not the pump, which looks like the unit itself has failed.

2. Look for the storage tank full indicator

Most RO units have an auto shut-off that stops the pump once the storage tank is full. If your unit has simply stopped rather than failed, dispensing water from the tap first (to lower the tank level) and waiting a minute is worth trying before assuming a fault.

3. Check the inlet water supply

If your main water supply has been interrupted — common during municipal supply timing gaps — the RO has no source water to process and will appear dead even though it's functioning normally. Check a regular tap in the house first.

4. Listen for the pump — even faintly

If you can hear a faint hum but get no water, the issue is likely downstream of the pump — a choked filter or blocked line — rather than the pump itself. If there's no sound at all, it's more likely electrical or the pump has failed, which points to a full diagnosis visit.

5. Note exactly what changed before it stopped

Did it stop right after a power cut? After someone else in the house touched the unit? During or after a recent filter change elsewhere? This detail, more than anything else, helps a technician diagnose the fault faster on arrival — mention it when you call.

Frequently asked questions

My RO shows lights but doesn't dispense water — what does that mean?

This usually points to a downstream blockage (a choked filter) or a closed tap/valve rather than a power issue, since the unit clearly has power if the lights are on. Check the tap and any inline valves before assuming a bigger fault.

Is it safe to keep opening and closing the RO to try to fix it myself?

Basic checks like the ones above are safe, but avoid opening the housing or disconnecting tubing yourself — reseating a filter housing incorrectly is one of the most common causes of leaks we get called out for.