Question about Hayward H Series Pool & Spa Heater 400k Btu Propane Gas Milivolt Ignition H400p1

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Heater problem I HAVE A HAYWARD HSERIES 400 THAT IM GOING TO TRY TO FIX .THE CUSTOMER SAY'S IT LIGHTS BUT TURNS OFF AFTER FIVE MINUTES.IT DOES NOT RELIGHT UNLESS HE TUNS IT OFF AT THE JANDY CONTROL

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The pressure switch had some debris in it. flushed it out and heater heated to temperature

Posted on Oct 03, 2009

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Posted on Jan 02, 2017

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1 Answer

Does this heater need a check valve?


ABSOLUTELY, 100% YES ! according to the instal manual. not putting one on the system will void your warranty. it must be installed in the line returning to the pool from the heater (before the salt generator, if equiped)

Sep 25, 2015 | Hayward HSeries Natural Gas Pool Heaters...

1 Answer

Error code 10


heater tried to lite 10 times turn off then back on then check gas and ignitor

Apr 13, 2014 | Hayward HSeries Natural Gas Pool Heaters...

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New Hayward Heater H series 400 BTU won`t light error IF


check gas pressure again meter could be too small if furnace goes on while heater is on it will run out of gas and turn off giving you that error

May 13, 2012 | Hayward H Series Pool & Spa Heater 400k...

1 Answer

2007 hayward h series 400 manual, I would like to see the manual online


I recommend you call Hayward technical support and they should be able to email a link to the online manual. I hope this helps.

Aug 02, 2011 | Hayward H - Series 400 Heater Top for In -...

1 Answer

Error code "CE" is being displayed. I was told to replace the control board, which I did. Still getting the error message. Does the system need to be restarted to recognize the new board? If so,...


Error code "CE" is "Communication Error" the manual for your heater gives the following description.. "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.
That being said If you replaced the board I would check all your connections closely and look for bent pins, corroded/oxidized connectors, etc. If this still does not help give Hayward a call, they usually give pretty good support. You can reach them at 908-351-5400

Sep 19, 2010 | Hayward HSeries Natural Gas Pool Heaters...

1 Answer

Hello Tech's. I have a Hayward H400IDL pool heater and I have a problem with the right lower connector on the printed circuit control board. The 4-wire connector must have had a poor connection and melted...


You can find manuel's at this site,
http://www.haywardnet.com/inground/products/manuals.cfm
Then you can find your part and part number. Armed with this you can order your part through your local pool store or a web site like Leslies.com and they can ship directly to you.

Sep 08, 2010 | Hayward HSeries Natural Gas Pool Heaters...

1 Answer

My Hayward 400 has no lights on the panel, no codes or modes


When cycling through the modes you have pool, spa and standby and a service light. When in pool mode watch for an IF reading the main cause of problems is a corroded bad thermistor found in the inlet/outlet header closest to inlet pipehas two smaller wires on it and unthreads out to replace

May 26, 2009 | Hayward H - Series 400 Heater Top for In -...

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