So, your RO has stopped functioning and you’re wondering whats going on ? Let me help you diagnose this issue.
The most common reason for a domestic RO to stop working is that there is no feed water available to the RO. This happens when the diverter valve has been switched off by mistake. But if there is feed water available to the RO, the following could be the reasons for failure to function:
1) The pressure pump has stopped working:
In case this is the issue, the best bet is to get the pump repaired. However, the pump is not always repairable. Sometimes, a new one may need to be installed. Either way, this may turn out to be an expensive proposition since the pump is the most expensive part of an RO system.
2) The adapter/smps has burned out:
If this is the case, the adapter/smps needs to be replaced. This operation can be performed easily in case you have experience changing wires in household electrical systems. The adapter is mainly required to get the pump to work since pumps in RO systems are DC pumps (Not AC). This is to prevent the chances of an electric shock.
3) The low-pressure switch has shorted out:
A low-pressure switch cuts off the RO machine in case the water pressure input to the RO is below a certain limit. This is to prevent the pump from running dry. The switch can be replaced quite easily of you know how to do common household repairs.
4) The Solenoid Valve has stopped working:
A solenoid valve cuts off water coming from the pump when the RO is switched off. This is to prevent the waste water to keep flowing from flowing into the membrane when the RO is non-operational. When the SV shorts out, it permanently shuts off, closing water supply to the membrane. This causes the RO to stop functioning.
5) The float valve is malfunctioning
The float valve shuts off the RO when the internal tank is full of water. This prevents over flowing. But when the float valve goes bad, it permanently shuts off the machine. This is a very common reason as to why an RO system stops working.
6) There is an air vacuum inside the RO
This usually happens in case one of the pipes is loose and the pump is sucking in air. This air gets trapped inside the RO’s piping and prevents it from functioning. Another reason for this could be that the pre-bowl filter is blocked and since it’s not letting water pass through, there is a vacuum being created. This vacuum prevents any water from entering the RO system.
The above six reasons are the main reasons why RO systems stop working. In case you have any questions, do leave them in the comments section.
Questions Regarding Reverse Osmosis Systems 
Hello,
Water is leaking out at the inlet to Sediment filter. The raw water first passes through the pre-filter and gets into sediment filter.I use a Kent Grand +. Where should I start the troubleshooting?
Even after the tank was full the waste water is flowing without stopping. Request for reason to rectify
your solenoid valve has damaged.
Sir what’s is the working of HP SWITCH and NRV IN under shrink RO
My RO does not sucking water
check your pump or float switch.. before change your pump check your float switch in bypass condition if your ro system is start working in bypass mode , then chage your float switch.
My Kent to stops working after 10 min approx.
After switching off & on to main line it again starts working again for the same time. What’s solution. Say in detail. Thanks in advance.
Check the pre filter. It might have clogged. The filter element needs replacement.
I have same problem. Did you check pre filter? Did it work after replacement?
It may possibility of burnt hardness wire.
What do i do if the diverter valdesaibina24@gmail.comve has been accidentally switched off
How to switch on the diverter vslve if switched off by mistake
Not working… When I switched on it just starts for a second and stopped.. Help me
a/c to d/c adapter was failed continuously in three tims (installastion after 1 day), what is the reson sir …
This most probably is due to the pump. Sometimes, the pump works, but pulls more power from the adapter thereby spoiling it. You may want to get your pump checked out.
Making tic tic noise not switching on motor
The motor is being cut off by either the pressure valve or the float valve. Please check those parts to see if they are working and replace accordingly.
Same problem also facing
In my Livpure pep + ro waste water is not coming why
My solenoid valve has stopped working is there any alternative for that solenoid valve
My Ro membrane is not outing water, but only waste water going on. what is that problem?
Your membranes are already clogged. Indication is high pressure. You can check it at your gauge.
Motor is running but output is not coming. Then started debugging. The water at output of Solenoid is not coming, but the the water at input of solenoid/ output of sediment filter is available. Solenoid might have gone bad. How to switch the solenoid diverter ON. what I am assuming correct ?. Do I need to replace the Solenoid.
You may have to replace the SV i’m afraid. With power fluctuations, the SV can go bad sometimes, especially during summer when fluctuations happen frequently.
My ro system running after auto stopage of motor.advise me the problem and solution
Water is running in to the resrvoyer after stopage of motor. Advice me what to do
change your float switch
My RO is getting water from the source even when it is in off position. Just got Membrane, Prefilter and SV replaced. Pls enlighten us
Can you elaborate a bit, when you say that the you are still getting water from the source ?
once the tank fills up, the float valve should cut off the machine. When switched off, the SV should prevent the water from flowing.
I changed my membranes and the yield drop drastically in just a month. I did cip using noah and citric acid but it seems to even get worse. Pls what could be the cause?
Must check your pre treatment first. RO membranes can filter up to .0002 micron. If your pre treatment is not in good condition, first to suffer is your membrane. Check the turbidity of your mmf and acf if you have. Also get sdi, check also the hardness of the pre treated/filtered water. Hardness must not higher to 5ppm.
I agree with Jack. The membrane can handle only so much when it comes to water hardness. You may want to get the TDS of your source checked out and go in for some pre-treatment of the water before it goes into the RO machine.
NEW RO RUNS ONLY FOR 9 DAYS ONLY RED LED LIGHT COMING , NO MOTOR PUMP IS WORKING
WHAT IS THE PROBLEM
My livepure ro supply light coming on but motor not working.
Kent RO – Power is ok – LEDs are good ( Power – Red , Service – Green ), but no motor sound and no water output. I have the input Cylinder and it has the water flow. What could be the cause? please suggest.
Correction – I have checked the input Cylinder and it has the water flow.
When the switch is on, waste water flows from the outlet but purified water is not collected in the tank. I cannot hear the sound of purifier working. What might be the reason? Please suggest.
Outlet water stop at my water purifier
I am using A O Smith X8. Suddenly it stopped working. Power is there. Initial flush indicator is turning on, but the flush solenoid is not working. Once the flush indicator is off, Inlet solenoid and pump should work, both are not working. No error code is coming.
My kent purifier show red light and is giving water instead of showing green light so is it safe for drinking …basically the technician said if it shows red light beeps and stop giving water it will need filter change here only problem is its not shoing green light?
My Kinetico R/O spouts water for 3 secs then goes to a dribble. New filters a month ago. System worked great for 2 weeks then the problem came up. Any ideas?
when swiched on beep sound start coming and filtered water also coming but some times green uv light 2 nos goes off
My RO is not working . When switched on red indicator glows with continuos
alarm sound. Waste water is coming out but motor does not starts. Possible
Reasons?
how to prevent adapter burn ? a stabiliser?
Hello,
I have a issue with Ro machine. New adaptor is fixing to run the machine, Once tank has filled
machine has stopped, once you drain the water, that time adaptor has not woking, LED is off.
but the fault adaptor has working once taken out from the machine, and you check with the plug sockets, adaptor light gets on, and its working with the another machine too…
the same issue happening nowadays, can you clarify , where is the problem in adaptor , pump, sv.
or adaptor components,?
kindly any one can address the issues.
thanks,
veera
dheesh.mani@gmail.com
I am having kent ro pearl. Recently it made heavy noise. I phoned kent service on 8344606554,Pavan Aqua services, Hyderabad. He charged inr 2750 and replaced pump & never gave bill. Previously the same firm has replaced the filters about 2 months back after charging rs 4250. Now panel is not working but the filter is okey. Though big claims are made, lot to be done on service front. I feel KENT filters are very costly to maintain.
My ro is not dispensing waste water bt it filtering water and i recently changed the membrane so cn you u plz tell me what should be the problem
Sir
Kent ro is not working continue it is stopped after 2min then run for 1min then stopped what may be the problem
I have changed the filter in dec 2019
My Kent RO’s green Light is working but usually the machine shakes on being switched on but its not happening now and its unable to pull water
My Kent RO’s (Pearl, 2014) pump not switching on, This problem is repeated after one month of service by Kent service person. Though he did not change any part, he solved the problem. Since purchase, I have not changed any filter. Can you help?
Red light of SMPS red continuous and does not turn green, continuous soundin6( not beep beep sound).
Not functioning at all.
Ro alarm was coming very slowly, we could not noticed, finally Ro has stoped working ,now what is solution,if I change membarance than RO can start working or not,after changing membarance if RO is still not getting on than what is next course of action to make it serviceable
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