Hayward pool pump not working properly - Hayward SAND FILTER, PRO SERIES

The purpose of the pressure switch is to verify the pool pump is operating properly and water pressure is present in the heating chamber. When water pressure is not present, the heater control system is designed to not allow initiation of flame. The pressure switch is preset at the factory for deck level installations. When the heater is located below the level of the spa or pool, the pressure switch may require an adjustment to compensate for the no-flow static head.

CAUTION: The Hayward Pool Heater is essentially a furnace. A trained technician should be consulted to repair it. DO NOT OPERATE the Hayward Pool Heater without a properly functioning and calibrated water pressure switch. The pressure switch adjustment requires both the pool pump and the heater be operational. As a result, extreme caution should be used during this procedure since sources of energy can not be isolated during the procedure.

The following procedure is recommended to calibrate the pressure switch.

1. The water pressure switch is located behind the front service panel. The pressure switch is typically on the left side, above the burners.
2. Be sure the water filter is clean before making the adjustment.
3. With the pump and heater system switch on, carefully turn the pressure switch adjustment dial clockwise, until a click is heard from the gas valve.
4. Turn the adjustment dial counterclockwise 1/4 turn.
5. Turn the pump off and on several times. The heater should shut off immediately when the pump is shut off. If the heater fails to shut down when the pump is off, repeat the steps above until the pressure switch is properly adjusted.
6. If the adjustment process fails to produce proper results the pressure switch should be replaced.

https://www.hayward-pool.com

LATEST ANTIVIRUS AND SECURITY MUST BE ON YOUR SYSTEM BEFORE ACCESSING ANY WEBSITES!

Here is the site for all Hayward Manuals.

http://www.hayward-pool.com/webapp/wcs/stores/servlet/ProductInfo_10201_10551_14502_-1___I#FiltersSand

Below is a link to the users manual for these pool filters. They have a helpful troubleshooting guide that you can follow. It should help you correct this issue and have your filter working properly to clean your pool in no time at all!

http://www.backyardcitypools.com/images/hayward/pro-series-manual.pdf

If D.E. is returning to the pool, it's usually because you have a tear in the grids or the backwash valve is not working properly and returning D.E. back to the pool.

Broken/torn grid, o-ring bad in the housing by the grid assembly or grids not in manifold properly. Backwash, open the filter, remove and inspect the grids (the plastic bases too).

Try these tips. I am guessing that one of these is the reason that your pool filter is not working properly. If you try these suggestions and they don't work, let me know and I will trouble shoot with you again.
1. Check skimmer and pump strainer baskets for debris.
2. Check for restrictions in intake and discharge lines.
3. Check for air leak in intake line (indicated by bubbles returning to pool.
4. Backwash your filter.
5. Be sure Vari-Flo valve is set on “Filter” position.

It sounds like the start switch contacts are not making good contact or there also may be a weak capacitor. These possible solutions do require a basic knowledge of motors to remedy. Start contacts can be cleaned and adjusted until proper replacement can be done.

you don't say the volume of the pool, but if the 1.5 was working before and you are not adding too many turns, it will work.
David