Question about Hayward H400FDP Low NOx Propane Gas Pool or Spa Heater

2 Answers

LO error code showing wont start up - Hayward H400FDP Low NOx Propane Gas Pool or Spa Heater

Posted by on

2 Answers

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Hayward Master
  • 1,631 Answers

For informational purposes...
LO is simply informing you that the Heater is not sensing proper water flow through it! 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.

Posted on May 25, 2015

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that got 5 achievements.

    Governor:

    An expert whose answer got voted for 20 times.

    Hot-Shot:

    An expert who has answered 20 questions.

  • Expert
  • 128 Answers

Low flow. Try cleaning the filter.

Posted on Nov 02, 2013

1 Suggested Answer

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

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

Has error 92


Trouble Item:
Hi-Lo solenoid failed

Probable Cause:
. Hi-Lo solenoid output terminals voltage is out of specification.
. Hi-Lo solenoid broken or short-circuited.
. Wiring harness broken or short-circuited.

Solution:
Engine does not start (This is a solution ????)
Check the Hi-Lo solenoid resistance (Page 9-S51 shows 10 to 12 ohms)
Replace the Hi-Lo solenoid

Oct 14, 2015 | Garden

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

P0700/p1603/p1604/po613


fco.lozano, mi carro cirrus 2005 lxi turbo 2.4 triptoni, a veces no entra la tercera c bloquea y nada mas entra segunda lo apago cuando ya esta medio frio lo enciendo y entran bien las velocidades pero c vuelve a calentar pasa lo mismo kien me puede ayudar xfa. gracias

Jul 18, 2012 | 2003 Chrysler PT Cruiser

1 Answer

Im getting a "LO" error


Hello,

The LO error code means the LID OPEN

Here is what the techicians service manual say to check

LO Door failed to unlock Door lock monitor switch does not indicate to the machine control board that the solenoid in the door lock mechanism retracted and unlock the door. 1.Check for debris inside inside the door lock mechanism, which may be jamming the lock solenoid. 2.check wire connections in harness leading from machine control board to door lock mechanism.
3.Check the door lock monitor switch for welded contacts.
4.Replace responsible component.

Jul 30, 2011 | Maytag Neptune MAH5500B Front Load Washer

1 Answer

I have a 2007 r1 it has had an error code HI this code comes up even when the bike is cold and prevents me from starting it . It will turn over , but if it says HI it wont start. only time it will start is...


Hi, Tom for this situation I would call my local dealer or reputable shop's service/parts department and inquire about any possible quick fix, answers, or parts inquiry. For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have a nice day.
Yamaha Fault Codes motorcycle manuals
R1 diagnostic modes and codes
Yamaha YZFR1 YZF R1 2007 2011 Factory Service Repair Manual Download...
OEM parts for Yamaha
http://mybikemanuals.com/yamaha/yamaha-yz-owners-manuals

May 31, 2011 | 2007 Yamaha YZF-R1

1 Answer

Getting LO error


Lo is an error code dealing with the safety loop, hi limit switches, water pressure switches. Check for continuity and the wiring between the hi limit switches and the water pressure switch. Also, check to make sure the filter is clean and the pump basket is empty. These also can cause a low flow situation that will cause the pressure switch to not close properly.

May 23, 2010 | Hayward 250kbtu Ng Pool Heater - Inground

2 Answers

"LO" error code on new H400FDN heater


it is low water pressure sensed, unit will not start unless pump is working

Jun 07, 2009 | Hayward 250kbtu Ng Pool Heater - Inground

1 Answer

ERROR CODE


Hi,Pls to shut - down the unit and try to power on ,may be its malfunction the control LCD.

THANX

Edgz

Mar 30, 2008 | Heating & Cooling

Not finding what you are looking for?
Hayward H400FDP Low NOx Propane Gas Pool or Spa Heater Logo

91 people viewed this question

Ask a Question

Usually answered in minutes!

Top Hayward Pool & Spa Experts

Jay Finke
Jay Finke

Level 3 Expert

1338 Answers

Bill Jordan

Level 2 Expert

372 Answers

john h

Level 3 Expert

10948 Answers

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

Answer questions

Manuals & User Guides

Loading...