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My hayward h series pool heater says LO in the error code screen and the service light is on

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 61 Answers

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

  • 5 Answers

SOURCE: Error code LO

Is the heater installed indoors?? if so you'll need a vent pressure orifice kit.
if not check your water press. (below 18 PSI on filter) Place filter on "recir" if it fires and stays on . it's the pressure.
check to see if all connections a set tight hi-ltd switch wire harness etc.

Posted on Jun 07, 2009

  • 139 Answers

SOURCE: hayward pool heater c4205 has error message of LO

lo usually indicates insufficient water flow and/or pressure switch malfunction.make sure filter is clean and pressure is in normal range

Posted on Jun 21, 2009

thepool
  • 78 Answers

SOURCE: 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.

Posted on Apr 23, 2010

  • 760 Answers

SOURCE: CE error code on hayward pool heater

CE= Communication Error between Control Module
and Display Interface Assembly
1. Disconnect and then reconnect power to heater.
2. Check for faulty wiring or connection.
Inspect Display Interface Wiring. Ensure Display Interface Plug is securely attached to Control Module. .
3. Control Module and/or Display Interface Assembly
are defective.Replace Control Module and/or Display Interface Assembly.
Here is a linkt oH aywardmanuals:
http://www.haywardnet.com/inground/products/manuals.cfm

Posted on Jul 05, 2010

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2 Answers

LO error


error codes don't appear on millivolt units. LO for digital models is an open safety within circuit, most common being the pressure switch

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Hayward h200 pool heater (LO) Error code


check gas pressure sounds like gas meter is too small

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How to fix bd error code on Hayward pool heater h series


Problem could be ordinary cleaning and maintenance, or bad control board.

Copy following link for Hayward error codes:
There are several entries for error bD
http://waterheatertimer.org/pdf/Hayward-error-codes.pdf

Hayward manuals on following links:
http://www.hayward-pool.com/prd/In-Ground-Pool-Manuals_10201_10551_14502_-1___I.htm
http://www.hayward-pool.com/pdf/manuals/H-series-Hxxx.pdf

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The CE code is showing on screen


Communication error


If communication between the ignition board and the display board is not established

within 3 s of power-up an error will be displayed. After communication is

established, if it is lost for 30 s, the error will be displayed. The error code will
be cleared upon a valid data exchange between boards.

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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

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1 Answer

The pool heater is not geting any gas to it We have the gas on Its not lighting It shows the letters LO on the sceen The service light is on


LO indicates insufficient water pressure. either your pressure switch is out of adjustment,faulty or your filter system needs cleaning(or backwashing).

Jul 10, 2009 | Hayward H Series

1 Answer

Hayward pool heater c4205 has error message of LO


lo usually indicates insufficient water flow and/or pressure switch malfunction.make sure filter is clean and pressure is in normal range

Jun 20, 2009 | Hayward H Series Pool & Spa Heater 400k...

2 Answers

Error code LO


Is the heater installed indoors?? if so you'll need a vent pressure orifice kit.
if not check your water press. (below 18 PSI on filter) Place filter on "recir" if it fires and stays on . it's the pressure.
check to see if all connections a set tight hi-ltd switch wire harness etc.

May 24, 2009 | Hayward H Series Pool & Spa Heater 400k...

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.

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3 Answers

Hayward H400 heater problem


LO usually indicates low water pressure. Check the pressure in your filter. You may need to backwash. If the filter is to clogged then the water pressure in the heater is so low that it won't activate the pressure switch. While checking the pressure turn the pump off and then on to make sure the pressure gauge is actually working. Also check the pressure coming out of the inlets into the pool. You should be able to tell if you have sufficient water pressure.

Jan 24, 2009 | Hayward H Series Pool & Spa Heater 400k...

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