Fixing a Sears Kenmore Water Softener

I have been struggling with the Water Softener for a few months now. I got it fixed by Sears for about 165$Cdn two years or so ago. A few months ago, it started having problems again. So I decided to try and fix it myself.

What is a water softener?

First a little background.

In North America city water is locally produced from underground water, not from a river like in Egypt. Deep under the ground there are aquifers, and the city taps into it, treats it and make it available to the inhabitants. If the bedrock has a lot of calcium, .e.g limestone, in it, then the water is often said to be "hard water".

Hard water causes a lot of problems: dishes would look cloudy, the tea kettle will have white residue in it, soap will not rinse from your hand (no squeaky clean feeling), your hair will clump if you use soap in the shower instead of shampoo, and the water heater efficiency will decrease as the calcium from the hot water precipitates on its walls. Soap and detergent use is also increased.

How does a water softener work?

So, there is a market for water softeners in places that have hard water.

A water softener works by having a tank that is filled with salt, and a tanks full of a special resin. The resin can remove the hardness from the water, but requires that it be regenerated by washing it with salt brine during regeneration. Water softener are either demand based (after a certain number of gallons have been processed), or time based (e.g. twice week). Regeneration happens in the early hours of the morning, depending on how you set it. It goes through several cycles, which are basically:

  • Fill: Water is passed to the salt tank
  • Brining: Water is left in the tank to form brine
  • Rinse: The brine is used to rinse the resin, remove the calcium that it has removed in the past, and make it able to remove calcium again
  • Back Wash: The resin tank is flushed for residues and iron deposit
  • Fast Rinse: The resin is rinsed from all the above
  • Service: This means that the water softener is serving soft water for the house

There are many brands of water softeners out there in the market. Many are rebranded. For example, Sears Kenmore, Ecoline and General Electric (GE) are the same. Culligan is also similar.

About my handyman's skills

Before I start, I should say that I am not at all handy with maintaining a house. Part of it is due to the fact that in Egypt most people live in concrete apartments, and not woodframe and drywall houses with lawns. Part of it is that I never got the hang of being mechanically adept, whether it is plumbing, carpentry, car maintenance, and such. So, fixing a water softener, which involves mechanical, electrical and plumbing aspects is quite a challenge.


Many things can go wrong with a water softener. The basic complaint is that "there is no soft water". Another is high water level in the salt tank. Yet another is salt level that does not go down as the weeks pass.


The manual for a water softener often has some comprehensive diagnostics that can be done to see

Start with cleaning the nozzle and Venturi. This should not require any tools, and can be disassembled and assembled by hand. Take note on how things fit before you remove them. Wash the components in water. Use some vinegar. Make sure there is no deposits, salt, rust, calcium or debris.

Then check the float in the salt well in the tank. The float should be able to move up and down, and the hose should be able to inject water in the tank and suck it again.

Then shut the water supply, drain the house (open the lowest lying faucet in the house), then disassemble the cam gear and rotor from the valve head. Check all the seals and gaskets and that there is no wear on the smooth side of the rotor.

Run the diagnostics as per the manual, and make sure that the cam gear moves well. If the motor is skipping and making a clicking sound and failing to move the cam gear, then replace it.

Replacing all the gaskets, the rotor, the cam gear and the motor should solve most problems, and only cost me 74$ Cdn. That is provided that the nozzle/venturi are clean, and that there is no obstruction to the float assembly.

Check for the formation of a salt bridge, specially in humid environment. Tap the side of the tank and see if there is a hollow sound at some spot under a solid sound. Use a broom stick to break it.

Once every six months, get a water softener cleaner (basically a sulphite powder that removes iron deposit. You can buy it at Canadian Tire or other hardware stores. It is more expensive at Sears, so avoid buying it there.

Every year or 18 months, try to remove all the salt from the tank and wash it. You can use warm water, and a wet/dry vacuum to remove it.


Fixing a water softener is easier than you think. Save your money and do it yourself. Get the manuals online, go buy the parts, and do it.

The morale of the story is: If I could do it, anyone can do it.

Resources and Links

Here are some useful links with more information:



Softener Model 625-388150

Similiar problem. Done all the checks and cleaning. All looks good except water is not softened. I assume that it is a resin issue. How much does it cost to have this fixed?

thanks Dave

Water softener

Did you ever find out what was wrong with your water softener? I have the same problem--low water pressure in house when softener is in service and more than one device is running. Much better water pressure when softener is bypassed.

goo in venturi

My tank is full of water. When I went to clean out the Venturi there was a gooy substance between the venture and the gasket and throug the rubber gasket and the small screen. It blocks everything. It almost looks like it was applied when installed. It's very sticky. What is it and should it be there?

I had this once and was told

I had this once and was told this happened with the older parts (I think it was red, new one is white) I believe the part needs to be replaced or atleast cleaned. Sears sent me the part free since apparently it was defective.

salty water

The water is salty (very slightly) coming out of the taps in the house. How can I fix this?

Water in salt tank

I have a sears water softner that is not working properly. My salt tank has water in it and I have no soft water. Can any one give me some hints as to what my problem may be.

water in salt tank

I also have water in salt tank, about a quarter full. No soft water! Water coming out of taps is salty, morning & night. I tried the cleaning the nozzle & venturi. 3 times. And recycled 3 times. Still no luck. Going to bite the bullet and call 1-800-4-my-home. lost manual, or threw it away thinking I will never need it.

water softener salt dam

Our water softener has a salt dam half way up the side of the unit. How can we remove this dam. Is there any product that will desovle this salt so we can get it out.

Thank you,

Water Softener causing Smelly Water

We have been told that the smelly water that we are getting is not from our water source by instead from our water sofener. Reason is that the chorine is eating away at the resin bed in the sofener.
Does any one know if this is true?


How long is too long for my softener (UltraSoft) to complete the process. Last evening it seems to have run on and on. I finally put it on By-pass. I can not find anything in my manuall that deals with this subject.

Thank you