Question about Hayward H400FDN Low NOx Natural Gas Pool or Spa Heater

1 Answer

Hayward H400 can not change temp or mode

Unable to adjust or change temp or mode

Posted by Anonymous on

Ad

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Top Expert:

    An expert who has finished #1 on the weekly Top 10 Fixya Experts Leaderboard.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Hayward Master
  • 5,096 Answers

Bad display board replace

Posted on Mar 19, 2016

Ad

6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Ad
  • 14 Answers

SOURCE: Hauward H400 heater won't turn on

check pressure switch operation most heaters will not operate without sufficient water flow/pressure. You can use a multimeter to troubleshoot the wiring using the schematic. If its induced draft milivolt ignition verify there is suffiecient gas flow to the unit

Posted on May 26, 2009

john224
  • 1378 Answers

SOURCE: THE DISPLAY READ

CE is a communications error on the board...the control module and/or Display interface assy. probably need to be replaced.

Posted on Dec 01, 2009

john224
  • 1378 Answers

SOURCE: my plumber needs manual for Hayward #H400 FDP

The P at the end stans for propane...the manual found here is for the H400FD series natural gas or propane.

John

Posted on May 31, 2010

StepehnD
  • 78 Answers

SOURCE: hayward H400 error code bo

This error means "Bypass Operation". On the back of the control module there are some "dip switches". They have an on or off position. Check switch number 2. Make sure it is in the "off" position. The "on" position is for a remote thermostat.

Posted on Jun 29, 2010

  • 44 Answers

SOURCE: I need to reset the

Turn off the breaker to the pump for 30 seconds.

Posted on Sep 28, 2010

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Can't adjust temp down h400


you may need a new control board. sounds like a button is not registering

Jun 07, 2014 | Hayward H400FDN Low NOx Natural Gas Pool...

1 Answer

Hayward h-series contol panel arrows dont work. cant adjust temp


ensure your getting 24volts to display circ board. you will probably need to replace the display screen

May 09, 2014 | Hayward H-series Electronic Gas Pool...

1 Answer

CAN A OLD STYLE H400 NATURAL GAS BE CONVERTED TO A LP GAS I HAVE A H400PED2 IT DIED IT IS NOT MAKE ANY MORE IF I FIND A H400 NATURAL GAS CAN IT BE CONVERTED


The last I checked a kit was available for this conversion.
I recommendyou call the Hayward technical support at 908-355-7995and they might be able to help you figure this issue out. Ihope this helps.

Sep 17, 2011 | Hayward H-series Electronic Gas Pool...

1 Answer

I can not turn off ob on the screen of my Hayward pool heater


I looked up the owners manual for the Hayward H400 heater and it did not list the "ob" indication. For this reason I would call the and they likely can help you out.

Please let me know how this turns out. Thank you.

Aug 30, 2011 | Hayward H-series Electronic Gas Pool...

1 Answer

Temp on water boils in heater core


This will be a water flow problem. If you have a heater by-pass it will need to be almost closed (80-90%) If the water has overheated you may need to remove the header going into the heater and replace the internal by-pass assembly.

Jul 30, 2010 | Hayward H-series Electronic Gas Pool...

1 Answer

H-series Electronic Gas Pool Heater H400: I have an H400 with digital temp control panel, th...


It is likely the keypad that has gone bad. Not difficult to replace. But you want to be sure thats what it is, as it is an electronic part, that is usually not returnable. The part number would depend on the model of the heater. Likely it is a h400idxl2 heater.

May 16, 2010 | Hayward H-series Electronic Gas Pool...

1 Answer

The temperature buttons on my hayward 400IDL heater stopped working. I can turn the modes between pool, spa and standby but the buttons for raising and lowering the temp. arent working. no codes are coming...


You most likely need a new touch pad and they are almost impossible to troubleshoot. If everything else works except "button A" then button A is bad and in this case that means the whole thing is bad. Sorry...

Apr 04, 2010 | Hayward H-series Electronic Gas Pool...

2 Answers

Hayward H400 Pool heater will not stay lit


"IF" - Hayward Pool Heater Fails to Ignite: the most common reason for this problem is insufficient gas supply. The Hayward heater LED display will show a diagnostic fault code of "IF" which stands for Ignition Failure. Undetected gas pressure problems if not investigated properly may result in unnecessary replacement and servicing of your Hayward Pool Heater.

Jun 06, 2009 | Hayward H-series Electronic Gas Pool...

Not finding what you are looking for?
Hayward H400FDN Low NOx Natural Gas Pool or Spa Heater Logo

Related Topics:

112 people viewed this question

Ask a Question

Usually answered in minutes!

Top Hayward Pool & Spa Experts

Jay Finke
Jay Finke

Level 3 Expert

1340 Answers

Bill Jordan

Level 2 Expert

372 Answers

john h

Level 3 Expert

12173 Answers

Are you a Hayward Pool and Spa Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...