Question about Hayward H Series Pool & Spa Heater Electronic Dual Ignition 250,000 Btu Natural Gas H250ed2

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H250 ed2 owners manual

CODE LO

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SOURCE: Hayward H250 giving me a "LO" error code and does not turn on.

9 times out of ten this means that you have a faulty water pressure switch. It could also be a limit switch, or air pressure switch. Make sure the filter is cleaned, and all valves are in the correct position. Once you are CERTAIN that water is flowing through the heater, you will need to short each individual component to find the faulty one.

Posted on Apr 11, 2009

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2 Answers

What does lo mean on my h250 hayward pool heater


LO standss for limit open. the most common cause is lack of adequate water flow through heater. other causes are high temp limits.

Jun 10, 2014 | Hayward H Series Pool & Spa Heater 400k...

1 Answer

Hayward H250 pool heater shows diagnostic code LO. Won't turn on. How do I fix it?


"LO" is simply informing you that the Heater is not sensing proper water flow through it! A Flow Problem.
A special sensor, called a pressure switch is this source. But... That does not mean it is bad - No, it is in most cases just doing its job!
Most common reason - Dirty Filter.
A good cleaning of the cartridges, or maybe a breakdown and recharge of a DE Filter, or a good cleansing backwash of your sand filter, will remedy this situation.
Or... Check for any OTHER reason or situations water flow may be reduced through the heater:
  • enough water in pool or spa?
  • If you have a weir gate in skimmer, is it stuck in the UP position?
  • Are any valves closed?
  • Do you have a bypass valve at the heater?
    • If open, this will reduce the amount of water going thru heater, close it to the point, LO goes away.
  • Etc
Good Luck - hope this helped.

May 11, 2014 | Pool & Spa

1 Answer

IFB washing machine front load Showing ' Lo' what


Error code LO normally means the filter is blocked. this would be the best place to start. refer to your owners manual for instructions on cleaning this.

Aug 10, 2013 | IFB Washing Machines

1 Answer

Hayward H250 has LO listed on the electronic panel after it had been blowing black soot out of it


check gas pressure heater overheated probably needs hi limits or fusible link plus clean heat exchange to solve

Oct 12, 2012 | Hayward H-series Electronic Gas Pool...

1 Answer

Hayward h250 ed2 failure error code IF


ignition failure check gas source if ok check ignitor

Aug 03, 2012 | Hayward H-series Electronic Gas Pool...

1 Answer

Pool heater want heat


Thank you for posting your question here on Fixya.com.

SF refers to the temperature sensor so short of disconnected or damaged wiring; you will need to replace the temp sensor. Your part number should be IDXLTER1930. We stock the original Hayward part and sell them for $48.94. If you want to order one use the contact feature found along the bottom of our page at www.arrowpools.net.

From your owner's manual found here.

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If this answer does not fix your problem, please comment with additional details prior to rating the answer. Positive feedback is appreciated once your problem is solved!

John

Apr 20, 2010 | Hayward 250kbtu Ng Pool Heater - Inground

1 Answer

Flashing LO


"LO" means a "Limit string open error" has occurred. See the owners manual for the many causes and possible solutions. Owners manual found here. http://www.haywardnet.com/products/Manuals/pdfs/Manual225.pdf

Apr 08, 2010 | Hayward 350K BTU H SERIES HEATER DRAFT...

1 Answer

Hayward H250 FDP Pool heater won't stay lite


sounds like a flame sensor.remove ignitor assembly and clean with fine emory cloth or steel wool.when properly cleaned it should feel smooth for entire length of sensor

Jun 20, 2009 | Hayward 250kbtu Ng Pool Heater - Inground

1 Answer

Hayward H250K gas pool heater error code


Low Flow errors are not necessarily real. They can be caused by improper adjustment or a defect of the pressure switch. Locate the pressure switch. Verify that the "switch" makes contact. Adjust the dial, reducing the distance the switch has to travel to engage. This will effectively lower the operating pressure required to operate. Keep adjusting until the unit stays on.

May 27, 2009 | Hayward 250kbtu Ng Pool Heater - Inground

1 Answer

Hayward H250 giving me a "LO" error code and does not turn on.


9 times out of ten this means that you have a faulty water pressure switch. It could also be a limit switch, or air pressure switch. Make sure the filter is cleaned, and all valves are in the correct position. Once you are CERTAIN that water is flowing through the heater, you will need to short each individual component to find the faulty one.

Apr 10, 2009 | Hayward 250kbtu Ng Pool Heater - Inground

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