My pump keeps turning off before running the amount of time I set on the timer.

Question edited for full 'make model (what it is)'.
Question moved from Cars and Trucks.

The Proline is purely a water timer. The issue is that you are running it from a pump. When the pump senses demand, it turns on, and then turns off when the timer turns off. If it is a submersible pump and you keep the pump running all the time it will burn out because it requires the water running through it to cool it. With an above ground Jet Pump, you could bleed off a small amount of water to cool it.

Application is important to this question. Here are your manuals

https://www.manualslib.com/products/Weathermatic-Proline-Pl1600-9071148.html

You could run it for longer and have a larger gap between cycles.

https://www.google.com/search?q=ProLine+PL+1600

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did you set the timer for filter --filters will run as per set cycles- cycles are usually preset[default 6 to 8 hrs ]per 12 hr

Heater cool down is very important and needs to be done. A time clock with a firemen switch is how it is normally done. Never run a heater with out water flowing thru it.

Are you sure that you do not have a delay timer on these lights? This is a feature that keeps the lights on for a set amount of time for you to see your way to the door or whatever. My light timer is on a 30 second hold before turning off.

Timer has gone bad, or polarity of outlet is incorrect, or voltage is incorrect, or all above.
Copy following link for product manuals and possible warranty:
http://waterheatertimer.org/GE-timers-and-manuals.html#striptimer

If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

You don't want to swim in water that has algae... 1st ...Make sure you have the correct amount of salt. See you manual for amount needed. Must set you pump timer first and sync your chlorinator between that time, if pump turns off before chlorinator cycle ends, you will get an "Low flow" alarm. Set you pump timer to run 12 hours and the chlorinator for 10 to 11 of those hours and should see results within 3 days or so. After that, If you live in an area that is hot, 10 hours pump and 8 to 9 chlorinator... Hope this helps...

1) Open link below so we are talking about same type of household system
http://waterheatertimer.org/Water-heater-recirculation-system.html

2) 15 minute interval is misleading.
Pins located on timer dial divide 24-hour day into 15 minute intervals.
You set timer pins and decide which 15 minute intervals you want ON-or-OFF. Do this by moving pins inward or outward with your thumb or ink pen. To check settings, manually rotate timer dial clockwise and listen for pump turning on-off..
Set timer pins for 4 consecutive 15 minute intervals, then timer runs for 1 hour.
After pins are set, then manually rotate dial to set current time.
Dial rotates as time passes, and pins click a lever that turns pump on-off.

3) 5-year Life span. Like all things plumbing, if you have hard water or sand-n-dirt in water lines, then pipes clog. And pumps clog.
Once motor begins to slow down, it overheats and burns out.
Water softener can keep sediment out of lines, but shortens life of water heater.
http://waterheatertimer.org/Clean-sediment-out-of-water-heater.html

4) Real question: do you need a circulation pump? Do you need hot water at your faucet? Can you schedule hot water use, or does recirculation pump have to run several hours per day?
Recirculation pumps causes water heater to run more, the pump consumes 25+ watts depending on pump, and water savings claims of 15,000 gallons per year are fabrication.
Realistic water savings is 700-2000 gallons per year, assuming several folks in the home use water sporadically across a full day, and each time water is used people are waiting for hot water. It also assumes that you never want cold water at the tap and that refrigeration ice maker line prefers hot water to cold.

5) Add a comment for more free help.
Also take advantage of fixya phone service.
For a price, fixya expert speaks with you over phone while you work on pump/timer or any do-it-yourself project.
We are always less expensive than a service call.

You posted under Paragon 2606 Panel-mount countdown timer.
If this is not your timer, add a comment.
http://waterheatertimer.org/Paragon-timers-and-manuals.html

2600 series is mechanical interval timer.
26006-00 can handle 10 amp loads.

Interval timer is a countdown timer that keeps Load turned on for set amount of time.
You set the time by rotating dial

To start timer, Rotate dial from 1 minute to 30 minute.
Rotating dial turns on Load and begins countdown.
Timer turns OFF Load after set amount of time expires.

Another option would be to get an electronic timer like the Intermatic P1353 that has 3 circuits on it that you could program to cut on and off at different times. For example, you could have one circuit that controls the pump and turns the pump on, then the second circuit would turn on the booster pump at a set time after the filter pump had come on and then the heater could be set to also run at a preset time after the pump circuit was activated. Since the pump, booster and heater are all 220, it's a straight forward hookup with everything in one timer box.

The lights, as stated before, would be on a separate circuit (110) and have its own timer or photosensitive eye set in line.

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.