Assuming your salt level is correct, that you have a salt system, that the salt cell is on and your salt cell is 5 years old or older, then my best guess is you need to replace your salt cell. Depending on the size of the cell, matched to the size of your pool, the cost will be substantial. In the mean time get a chlorine float dispenser, shock your pool the old fashioned way and use chlorine tablets until the cell can be checked and/or replaced.
What is your Salt Level?
Efficiency level is right at 3500 ppm
SOURCE: Pump works in spa mode, but doesn't work in pool mode. Why?
We need more info. Which control system is it? Suntouch, easytouch, intellitouch.......? It sounds like a programming problem in the controller.
SOURCE: I am looking for the most energy efficient way to
You run a pool pump based on pumping volume compared to pool volume and long enough to turn the water over frequently enough to keep it balanced and clear.
You should have no need to run it 24 hours a day to accomplish that since the pool is indoors and safe from the effects of weather and sunlight.
What you will want to do is determine the minimum amount of time then the pump needs to operate to keep the water balanced and clear based on fill water makeup, your chemical choices and bather loads and then set the timer to run the system for that amount of time and the pump for the speed required.
If you really want to be sure you are as efficient as possible you will need to look at the pump curve for your exact model and look for the point on the curve the pump is most efficient at, speed/volume wise and run it at that setting for the time you find thru experience mentioned above. That way the pump moves the most water it can at it's most efficient point for as little time as is required to keep the pool clean.
I hope I worded that in a way that makes sense.
SOURCE: I have a Pentair Intelliflo pump system and lately
Your pipe could be clogged or you may have a clog in the impeller. Check the pump basket and if it is cracked then it is probally in the impeller and you may be able to reach it with a screwdriver and needlenose. If you have a crack in the skimmer basket it could be in the line and you can check this by putting a kitchen sponge in the skimmer and if it comes out in the pump the line is clear. If it is clogged you may be able to clear it with a flush bag you can get at any hardware store. If that dosn't do it you will need to get a pro. Good luck.
SOURCE: I have a Pentair Intelliflo pump system and lately
It sounds to me that your diffuser oring needs to be replaced. This is a common problem with that pump. The oring stretches out or breaks and this will keep the pump from creating a vaccum. This is easy to check. Shut the power off to the pump. Remove 6 bolts holding the seal plate together (do not remove the bolts that mount the motor to the pump). Their will be 2 bolts at top and bottom on each side of the seal plate that have no nuts and two bolts in the middle on each side of the seal plate that have nuts. Grab the motor and pull it away from the pump. You will see a cone on the front of the assembly. Check the oring and make sure it fits snug around the cone. If not, replace the oring. This is most likely what is wrong with your pump.
SOURCE: Will Pentair Intelliflo pump save me enough money to justify cost
Here are a couple of thoughts. If you install an intelliflo pump and run it for the same amount of time and at the same rpm as your current pump, you will still have a savings. If you drop the rpms by 1k, you will have an exponential savings. Go to the pentair website and use the program to estimate your actual savings. You can still run the heater at a reduced flow setting but there is a limit, you have to check with the heater manufacturer to see what the minimum is.
If you are running a conventional pump 24/7 you are using a ton of energy. You should be able to run the pump for 8 hours a day and achieve the same results. For instance, running the pump from 4am to noon should give you a good window to maintain the heat and not run it all the time. It also depends on if you have a cover on your pool when it's not in use. If you don't, you will lose significant heat when it's not running, however, running it early morning should give it a chance to heat back up before you want to use it again. You will have to experiment with timer settings, etc..
I really do think the intelliflo pump is a great pump. The rare earth magnet design allows it to be way more efficient than the conventional pump. It is so much more efficient that when it's running, you can hold your hand on the motor and it is just warm. Your pump motor probably runs very hot, heat is a by product of inefficiency. I hope this helps.
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