Your water purifier stopped working, the water tastes different, or something is leaking. Before you call for an emergency service visit at ₹800–1,500, try these troubleshooting steps. Many common problems have simple fixes that take less than 5 minutes.
Quick diagnosis chart
| Problem | Most Likely Cause | DIY Fix? | When to Call Service |
|---|---|---|---|
| No water at all | Power off / inlet valve closed | Yes — check power and valve | If basics are fine and pump is silent |
| Very slow flow | Clogged sediment filter | Yes — replace pre-filter | If flow remains slow after filter change |
| Salty/metallic taste | RO membrane degradation | No — needs membrane replacement | Immediately |
| Chlorine taste | Carbon filter depleted | Yes — replace carbon filter | If taste persists after replacement |
| Leaking from unit | Loose filter housing / O-ring | Maybe — reseat filter and check seal | If leak is from cracked housing or tubing |
| Loud pump noise | Clogged filter or pump wear | Check filters first | If noise persists after filter change |
| Purifier runs continuously | Faulty auto-shutoff valve | No | Immediately — wastes water and stresses pump |
| TDS higher than usual | Membrane aging | No | Schedule service — membrane replacement likely |
Problem 1: No water output
Check these in order:
- Power: Is the purifier plugged in? Is the socket working? Try another appliance in the same socket.
- Inlet valve: Is the water supply valve to the purifier open? It may have been turned off during plumbing work.
- Water supply: Open your regular kitchen tap. If no water or low pressure there, the issue is your supply, not the purifier.
- Pump sound: Does the pump hum when power is on? No sound = possible pump failure (call service).
- Pre-filter: A completely clogged sediment filter can stop flow entirely. If the filter is more than 6 months old, replace it.
Problem 2: Bad taste or odour
| Taste/Odour | Cause | Action |
|---|---|---|
| Salty or brackish | RO membrane degradation | Check output TDS; replace membrane if elevated |
| Chlorine / swimming pool | Carbon filter exhausted | Replace carbon filter immediately |
| Metallic | Iron or metals passing through degraded membrane | Replace membrane; check input water |
| Musty / earthy | Bacterial growth in tank or post-filter | Flush 3–5 litres; clean tank; replace post-filter |
| Sweet (after service) | New mineraliser cartridge settling | Normal — flush 5–10 litres |
| Plastic | New unit or new housing | Normal for first 24–48 hours; flush thoroughly |
Problem 3: Leaking
Locate the leak source:
- Filter housings: Most common after service visits. Turn off inlet, open housing, check O-ring for damage or misalignment, reseat and tighten.
- Tubing connections: Press push-fit connectors firmly. If tubing is cracked, it needs replacement (service call).
- Drain line: Ensure no kinks or blocks causing back-pressure. The line should have a clear downward path to the drain.
- Tank: Rare but possible in older units. If the tank itself leaks, it needs replacement.
Problem 4: Slow flow
- Replace sediment pre-filter (most common fix)
- Check inlet water pressure (should be 10+ PSI)
- Check RO membrane age — fouled membranes reduce flow gradually
- Check for kinked tubing between components
When smart monitoring prevents problems entirely
Most water purifier problems develop gradually and are detectable weeks before they become obvious. The Boon Tap with WaterAI prevents the most common issues:
- TDS creep: App shows output TDS trend — catches membrane degradation before taste changes
- Filter exhaustion: Per-stage filter health percentage tells you which filter needs attention
- AI predictive alerts: Predicts component failure weeks in advance based on usage patterns
- Remote diagnostics: Boon’s care team can check your purifier status remotely before dispatching a technician
Most emergency service calls (₹800–1,500 each) are preventable with smart monitoring. See the full filter replacement guide for proactive maintenance.
Frequently Asked Questions
Why is my water purifier not producing water?
A water purifier that stops producing water can have several causes. First, check the basics: ensure the power supply is on and the plug is properly connected, as power outages or loose plugs are the most common reason. Second, check that the inlet water valve is open because someone may have turned it off during plumbing work. Third, check inlet water pressure by opening the regular kitchen tap. If the tap water flow is weak, the issue is your water supply, not the purifier. RO purifiers need minimum 5 to 10 PSI inlet pressure to function. Fourth, a clogged sediment pre-filter restricts water flow to the point where the purifier cannot produce output. If the filter is visibly brown or clogged, it needs immediate replacement. Fifth, the RO booster pump may have failed, which prevents water from being pushed through the membrane. A non-functioning pump usually produces no sound at all when the purifier is switched on. Sixth, the auto-shutoff valve may be stuck, preventing new water from entering the system.
Why does my purified water taste bad or different?
Changes in purified water taste indicate a component issue that needs attention. A salty or brackish taste means the RO membrane is degrading and allowing more dissolved solids through. Check output TDS with a meter or smart app. If it has risen significantly from your baseline, the membrane needs replacement. A chlorine or chemical taste means the pre-carbon filter is depleted and no longer absorbing chlorine and organic compounds from the input water. Replace the carbon filter immediately as chlorine passing through also damages the RO membrane. A metallic taste can indicate iron or other metals passing through a degraded membrane, or in some cases corrosion in the purifier’s internal tubing. A musty or earthy taste usually indicates bacterial growth in the storage tank or post-filtration components, often caused by prolonged non-use. Flush the system by dispensing and discarding 3 to 5 litres, then check again. An unusual sweet taste after filter replacement may be normal for the first 5 to 10 litres as mineral cartridge media settles.
Why is my water purifier leaking?
Water purifier leaks can originate from several points. The most common leak source is loose or improperly seated filter housings after a filter change. If the leak started immediately after a service visit, the technician may not have tightened a filter housing completely. Turn off the water supply, open the housing, check the O-ring seal for damage or misalignment, reseat the filter, and tighten firmly. Cracked filter housings from over-tightening or age are another common cause, particularly in budget purifiers with thin plastic housings after 3 to 4 years of use. Leaks from tubing connections usually mean a push-fit connector has loosened or the tubing has developed a crack. Check all visible tubing connections and press firmly into any loose push-fit connectors. Drain line leaks from the reject water outlet are common if the drain hose is kinked or blocked, causing back-pressure that forces water out through connections. Ensure the drain line has a clear, downward path to the sink drain.
Why is my water purifier making a loud noise?
Water purifier noise primarily comes from the RO booster pump and is normal at a low hum level during operation. However, several conditions cause abnormally loud noise. A rattling or vibrating noise usually means the purifier housing is not securely mounted on the wall, or the pump mount has loosened. Check that the unit is firmly secured and all screws are tight. A high-pitched whining noise from the pump indicates the pump is working against excessive resistance, typically from a clogged pre-filter or a severely fouled RO membrane. Replace the sediment and carbon filters and check if the noise reduces. A grinding or clicking noise suggests the pump bearings are wearing out, which typically happens after 3 to 5 years of continuous use. This requires pump replacement by a technician. A gurgling or bubbling noise is usually air in the system, common after a filter change or when the water supply has been interrupted. Run the purifier for 5 to 10 minutes to flush air out of the system.
How do I fix slow water flow from my water purifier?
Slow water flow from an RO purifier is one of the most common complaints and usually points to one of four issues. First, a clogged sediment pre-filter is the most frequent cause because it is the first line of defence and clogs fastest. If the filter is more than 3 months old in high-sediment water, replace it and check if flow improves. Second, low inlet water pressure means the RO pump cannot push water through the membrane at adequate speed. Check your regular tap flow. If it is also weak, the issue is your water supply. You may need a pressure booster pump before the purifier or need to wait for supply pressure to normalise. Third, a fouled RO membrane restricts flow as mineral deposits accumulate on its surface over time. This is a gradual decline. If the membrane is older than 12 months with standard membranes or 24 months with advanced membranes, replacement may be due. Fourth, a faulty check valve or flow restrictor can reduce output. These are internal components that a technician needs to inspect.