Question about Hayward 250kbtu Ng Pool Heater - Inground

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H250 cycles on and off pressure is fine. system normal light on. new sand and clear pool. would like to know how to fix problem myself.

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I would probably look at your high limit switches first and then at the bypass assembly inside of the header. The bypass controls the heat rise inside the heater. If it is bad, it may heat up too quickly, opening up one of your high limits. That will shut down the heater, once it cools back down, it will start again, and so on and so on.

Posted on May 22, 2010

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Sand filter seems to be working fine but a couple of days after I backwash I notice sand in the bottom of pool. I assume it is coming from filter. What can I do to fix this.


Vacuum it up. This fine sand will return to the sand filter and become trapped. Normal operation for a sand filter. Consider an automatic pool sweep, like Polaris. That will take this "problem" off your mind.

May 20, 2017 | Washing Machines

2 Answers

My haward sand filter is running at about 20 psi is that normal


That 20 PSI does not mean anything to anyone that is going to help you. Every system will have its own "Starting Pressure". It all depends on how it is plumbed, what equipment is included (size and GPM), how big the pool is will address the issue of how much plumbing is involved, total feet & amount of fittings, valves, etc (mainly elbows create more restriction, raising the overall PSI, and if a Solar System is involved?

So, is 20 PSI normal, if you have a Solar System in an average inground pool in the backyard, then that could be about normal? If you have an Above ground pool with only a pump & filter, then that could be pretty high over normal.

The best thing is to backwash your filter very good, if possible use a sand filter media cleaner, available in most Pool/Spa Retail Stores. Follow the instructions on the label and proceed with the cleansing of the sand (media). Then when you turn everything back on to normal filter mode after the cleansing, make a note of the pressure! This will be "Your Systems" starting pressure. Take a "Sharpie" and write that number right on the filter tank. When the pressure climbs to 8-10 lbs over that starting pressure, backwash.

Jun 27, 2014 | Hayward SAND FILTER, PRO SERIES

3 Answers

Pump is blowing cloudy water back into pool


Cloudy water is the bane of sand filters!. I suggest letting filter run day and night. Do not backwash until the pressure rises 8 - 10 pounds above clean starting pressure. Do not try to vacuum or stir up the sediment. when water clears, vacuum to waste. Keep the hose running while vacuuming. A dirty filter is a better filter (up to a point). At a higher pressure the filter will trap more of the fine particles that are clouding your water.

May 28, 2013 | Pentair Meteor Above-ground 22" Sand...

1 Answer

I have a Hayward Pro series Model S 180T and my pump is not pulling in the water through the skimmer like it did, therefore I am not getting the circulation in my pool like I had in the past. I checked all...


There are a few things to look at here. First is filter pressure.
Check the pressure guage on the filter . If it is at a normal pressure, you sand is probably fine, but do a 20 minute backwash anyways.

Next, are you out doors? if so, when the last time you serviced your pump. All it takes is a bad shaft seal, some pine needles, or some leaves to completely block the impeller in the pump. The is easy to check, simply remove the wet-end of the pump and look inside.

If its the shaft seal, the pump wouuld be dripping water in between the wet-end and the motor.

Also, make sure all skimmer baskets and/or main drains are clear of debris.

Also, make sure all valves are in the correct position.

If the pressure on the filter is normal, again, i wouldnt think its the filter sand.

Apr 12, 2011 | Hayward SAND FILTER, PRO SERIES

3 Answers

Pressure up past 15 or 20 shortly after


The sand is clogged and needs a backwash or change.

May 25, 2010 | Hayward Pro Series 18" Above Ground Pool...

1 Answer

How to open pool, fill sand filter with water?


I happen to have a copy of the users manual for this pool filter. These are the instructions for operating your filter.

1. Be sure correct amount of filter sand media is in tank and
that all connections have been made and are secure.
2. Depress Vari-Flo control valve handle and rotate to
BACKWASH* position. (To prevent damage to control valve
seal, always depress handle before turning.)
3. Prime and start pump according to pump instructions (be
sure all suction and return lines are open), allowing the filter
tank to fill with water.
WARNING: ALL SUCTION AND
DISCHARGE VALVES MUST BE OPEN WHEN
STARTING THE SYSTEM. FAILURE TO DO
SO COULD CAUSE SEVERE PERSONAL
INJURY.
Once water flow is steady out the waste line, run the pump for
at least 2 minutes. The initial back-washing of the filter is
recommended to remove any impurities or fine sand particles
in the sand media.
4. Turn pump off and set valve to RINSE position. Start pump
and operate until water in sight glass is clear—about 1/2 to 1
minute. Turn pump off, set valve to FILTER position and
restart pump. Your filter is now operating in the normal filter
mode, filtering particles from the pool water.
5. Adjust pool suction and return valves to achieve desired
flow. Check system and filter for water leaks and tighten
connections, bolts, nuts, as required.
6. Note the initial pressure gauge reading when the filter is
clean. (It will vary from pool to pool depending upon the
pump and general piping system). As the filter removes dirt
and impurities from the pool water, the accumulation in the
filter will cause the pressure to rise and flow to diminish.
When the pressure gauge reading is 8-10 PSI (0.55-0.69
BAR) higher than the initial "clean" pressure you noted, it is
time to backwash (clean) the filter (see BACKWASH under
Filter Control Valve Functions.)

Apr 16, 2010 | Hayward SAND FILTER, PRO SERIES

1 Answer

Haward H250 dual therm, heater lights then shuts off after 5 to 10 seconds,even with pressure switch bypassed


it sounds like a flame sensor.its located in lower end of burner box,remove it and clean with fine steel wool or emory cloth.

Sep 02, 2009 | Hayward Pool Products HAYWARD H-Series In...

1 Answer

Hayward sand filter not filtering small particles


You probably have too big of pump. It is pushing the finer stuff right back into pool. Try adding a clarifier. Don't backwash either until the pressure goes up.

Jul 30, 2009 | Hayward Pro Series 18" Above Ground Pool...

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