Pool and Spa

Questions about pool repair? Ask an Expert online.

Ask an Expert,
Get an Answer ASAP!

I just had a Hayward H400FDP pool heater installed and it…

Customer Question
I just had a...

I just had a Hayward H400FDP pool heater installed and it tries to fire up and ignite but won't, what could be the possible problem? The propane is hooked up

Contractor's Assistant: Who manufactured the pool?

Im not sure, does it matter?

Contractor's Assistant: Do you plan on doing the work yourself?

Yes i can if it is a possible fix

Contractor's Assistant: Anything else we should know to help you best?

I cant think of anything except that the LO message comes on also

Submitted: 7 months ago.Category: Pool and Spa
Show More
Show Less
Ask Your Own Pool and Spa Question
Answered in 13 minutes by:
12/15/2017
Pool and Spa Expert: Rick, General Contractor replied 7 months ago
Rick
Rick, General Contractor
Category: Pool and Spa
Satisfied Customers: 24,404
Experience: Licensed construction supervisor with 35+ yrs. experience.
Verified

Welcome to Just Answer, my name is ***** ***** I will do my best to help you with your issue. If my initial response doesn’t answer your question then let me know and we can continue our conversation.

An LO is an open limit circuit. Here's a link to the manual. The possible culprits are listed on page 54. The parts blow up on page 59 will locate these devices
http://www.hayward-pool.com/assets/documents/pools/pdf/manuals/universal-h-series-installations-manual.pdf

Ask Your Own Pool and Spa Question
Was this answer helpful?

How JustAnswer works

step-image
Describe your issueThe assistant will guide you
step-image
Chat 1:1 with a pool and spa expertLicensed Experts are available 24/7
step-image
100% satisfaction guaranteeGet all the answers you need
Ask poolguy810 Your Own Question
poolguy810
poolguy810
poolguy810, owner - pool and spa service company
Category: Pool and Spa
Satisfied Customers: 1,675
1,675 Satisfied Customers
Experience: Servicing pools and all brands of spas for over 28 years.

poolguy810 is online now

A new question is answered every 9 seconds

How JustAnswer works:

  • Ask an ExpertExperts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional AnswerVia email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction GuaranteeRate the answer you receive.

JustAnswer in the News:

Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.

What Customers are Saying:

You did one super job of explaining to me everything there is to know about this fridge. I'm looking forward to asking you questions in the future.

JimmyBagley, IA

Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help.

Mary C.Freshfield, Liverpool, UK

This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!!

AlexLos Angeles, CA

Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult.

GPHesperia, CA

I couldn't be more satisfied! This is the site I will always come to when I need a second opinion.

JustinKernersville, NC

Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around.

EstherWoodstock, NY

Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know.

RobinElkton, Maryland

< Previous | Next >

Meet the Experts:

poolguy810

poolguy810

owner - pool and spa service company

1,675 satisfied customers

Servicing pools and all brands of spas for over 28 years.

Jerry

Jerry

Technician

310 satisfied customers

owned and operated spa and pool retail store for 12 yrs

PitschPlumbing

PitschPlumbing

master plumber

184 satisfied customers

Factory Authorized service for Rheem, Raypak, Jandy and Laars pool heaters. Gas licensed

spaman101

spaman101

spa/hot tub technician

125 satisfied customers

Spa repair and troubleshooting ..

Charles

Charles

Technician

38 satisfied customers

20 years experience

Poolscaper

Poolscaper

Pool and Spa Installer

26 satisfied customers

I own & operate a full service Pool & Spa Const.~ Service~Retail store

answersmadeeasy

answersmadeeasy

Pool Technician

13 satisfied customers

Experienced in pool and spa equip, heaters, salt systems

< Previous | Next >

Related Pool and Spa Questions
I cannot get the pilot light to ignite on my h400fdp hayward
I cannot get the pilot light to ignite on my h400fdp hayward pool heater … read more
canuck the pro
canuck the pro
263 satisfied customers
How do u fix the error message LO on the 400 FDP. The house
The house was bought 3 years ago and we've never been able to get it to work … read more
Rick
Rick
General Contractor
24,404 satisfied customers
Hayward gas pool heater will light but wont fire. Cant
hayward gas pool heater will light but wont fire JA: Who manufactured the pool? Customer: cant remember JA: Do you plan on doing the work yourself? Customer: yes JA: Anything else we should know to he… read more
Rick
Rick
General Contractor
24,404 satisfied customers
I have a brand new Hayward Universal heater H400FDP that was
I have a brand new Hayward Universal heater H400FDP that was hooked up by professionals and was working fine. Then 3 days ago when I tried to turn it on I keep getting the yellow service light coming … read more
Airheatman
Airheatman
Heating & Air Conditioning Contractor
6 years college
1,836 satisfied customers
Wow that was quick. I have a Hayward 250H inground pool
Wow that was quick. I have a Hayward 250H inground pool heater. The heater would go on an off intermittently. I would cycle it through the two mode and could get it to stay on. Now it has stopped and … read more
Billy
Billy
Journeyman Service Technician
State Licensed Mechanical Contractor
9,330 satisfied customers
Bought a new 150000 btu Hayward pool heater (gas) all
Bought a new 150000 btu Hayward pool heater (gas) all connected will not lite . Im getting an LO code ????… read more
Billy
Billy
Journeyman Service Technician
State Licensed Mechanical Contractor
9,330 satisfied customers
I have an electronic ignition Hayward H250 LP that won't start.
I have an electronic ignition Hayward H250 LP that won't start. It's a brand new unit. I switch it from off to on and then from standby to pool. And yes, the pump is running when I try it. I can see t… read more
garrygoeson
garrygoeson
Owner/Operator
Associate Degree
234 satisfied customers
How to fix a Hayward H250 natural gas pool heater?
I have a Hayward H250 Natural gas pool heater. When the pool starts up in the morning the heater will go into IF - Ignition Failure. I have to go through and cycle it about 4 times before it will igni… read more
poolguy810
poolguy810
owner - pool and spa service company
2 years electro mechanical training
1,675 satisfied customers
I have a Hayward H200 propane pool heater. We just relocated
I have a Hayward H200 propane pool heater. We just relocated our pool pumps and heater to a new location this season. when firing up the heater today after the gas company re-ran all the gas lines, an… read more
PitschPlumbing
PitschPlumbing
master plumber
Master Plumber
184 satisfied customers
I have a Hayward H100D above ground propane pool heater. It
I have a Hayward H100D above ground propane pool heater. It worked fine last season, I removed it and stored it inside for the winter. I hooked it up and it is not heating the water. It comes on, the … read more
Jerry
Jerry
Technician
High School or GED
310 satisfied customers
I installed a hayward 300k btu pool heater for my in ground
I installed a hayward 300k btu pool heater for my in ground pool. Everything seems to be working, except I get the LO code on the readout. My pool is 25 yrs old, and was plumbed with 2" PVC, and I hav… read more
PitschPlumbing
PitschPlumbing
master plumber
Master Plumber
184 satisfied customers
HI,I have a Hayward Pool Heater Lo Hox (I think the name)
HI, I have a Hayward Pool Heater Lo Hox (I think the name) it is about 40,000 BTU natural gas 240 Volt. Blower moter in side. It has ran great for the past 6 or so years. Last fall I was in the pool h… read more
poolguy810
poolguy810
owner - pool and spa service company
2 years electro mechanical training
1,675 satisfied customers
I have a Raypak 265B pool heater that is getting the "ILO"
I have a Raypak 265B pool heater that is getting the "ILO" error message, intermittently. Here are my symptoms- I turn the unit on. I get "CFH". I hear it spark (buzz) twice. Then the "ILO" code appea… read more
PlatCEO
PlatCEO
CEO
Vocational, Technical or Trade Scho
53 satisfied customers
I have a Hayward H150 pool heater with an electronic ignition.
I have a Hayward H150 pool heater with an electronic ignition. It worked fine all summer and then the other day, I went to fire it up, it tried starting but then I got IF for ignition failure, Is this… read more
Fix my Pool and Spa
Fix my Pool and Spa
Owner
Certified Service Technician
862 satisfied customers
I just purchased a hayward H100 propane pool heater. I had
I just purchased a hayward H100 propane pool heater. I had one in the past. The pool heater is connected correctly, has a full tank of propane, i even purchased a new igniter (a pool company recommend… read more
Fix my Pool and Spa
Fix my Pool and Spa
Owner
Certified Service Technician
862 satisfied customers
Hayward H400 heater. fires up then shuts down in 10 seconds.
Hayward H400 heater. fires up then shuts down in 10 seconds. have 11 teenagers that want to hot tub HELP… read more
PitschPlumbing
PitschPlumbing
master plumber
Master Plumber
184 satisfied customers
I have hayward model H150 ED2 Heater will not fire, i replaced
I have hayward model H150 ED2 Heater will not fire, i replaced water pressure switch, when i turn it on it clicks but won't fire. it's been doing this for years, then all of a sudden it will work ? LO… read more
Fix my Pool and Spa
Fix my Pool and Spa
Owner
Certified Service Technician
862 satisfied customers
Im looking to replace my pool heater. I live south of Tampa.
Im looking to replace my pool heater. I live south of Tampa. A contractor recommended a Heat Wave, which I think is made by Hayward, but I heard that may be because he gets a kick-back from Hayward? I… read more
Fix my Pool and Spa
Fix my Pool and Spa
Owner
Certified Service Technician
862 satisfied customers
Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Show MoreShow Less

Ask Your Question

x