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Hayward 400 series propane pool heater. Will not ignite. Propane full and line is open. It clicks a few times, blower starts, makes sound like it will ignite, but it does not ignite.

Posted by Douglas Bonoff on


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john h

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  • Hayward Master
  • 23,504 Answers

Check and test thermocouple

Posted on Apr 30, 2019


5 Related Answers


John Prohaska

  • 1378 Answers

SOURCE: Hayward model H100ID1 pool heater

The diverter inside your manifold is likely broken. You should stop using the heater immediately as the nocking is from water starting to boil in your heat exchanger. This can lead to a dangerous situation if a limit switch does not act in time.

Pull the inlet hose from the heater and you should see a plate just inside. If you can move it around it is broken and the fix is a new exchanger assembly.

You can fin these online and we sell them at

Posted on Jun 18, 2009


John Prohaska

  • 1378 Answers

SOURCE: Hooking up a pool heater to propane.

A pressure regulator and pipe or hose. Whoever is selling you the tank/propane should be able to help you size everything based on the tank hook-up and tank pressure. The heater nameplate will tell you the proper inlet gas pressure that the regulator will need to reduce the tank pressure to.

Posted on Sep 08, 2009


  • 64 Answers

SOURCE: H Series Pool & Spa Heater 400k Btu Propane Gas Milivolt Ignition H400p1: how do i fix the AO code on my hayward heater?...

AO will apply to your blower, blower tubing, or blower vacuum switch. You need to check these items.

Posted on May 20, 2010


  • 78 Answers

SOURCE: I'm receiving an error code CE on my Hayward H

Open up the control panel access door on the front. (the display). Remove the 2 screws at the top and tilt the assembly out. There should be a tab on the bottom that helps keep the assembly stable. Check all the connections on both boards for fit and broken wires. If all is ok, I would shut the supply power off, then back on and see if the data transfer works. If not, bad boards.

Posted on Jul 25, 2010

Testimonial: "Great advice. Working like a charm. No loose wiring. 2 large beetles between the circuit board and the display. Blew them out and it works great."


  • 1 Answer

SOURCE: Conversion for Hayward H200 Ing Pool heater from propane to NG

I have a hayward h-2001 natural gas heater that I wish to change to propane. perhaps we can swap parts. [email protected] 920-324-5652

Posted on Jun 24, 2011

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Related Questions:

1 Answer

Why won't my Hayward H Series H200 pool heater not lite, what is the most likely problem

there are a few things you can check. make sure you have a good fuel supply. make sure the pilot light is lit. (just because the pilot is on doesnt mean you have good fuel supply). the pilot may be out of adjustment from the burner rail. the igniting burner rail may be dirty or blocked

Aug 13, 2014 | Hayward H Series Pool & Spa Heater 200k...

1 Answer

Hayward h400 pool heater blower not starting

it could be a bad blower vac switch, and you may look at the rubber tubing going into the switch to ensure it hasnt dry rotted.

Apr 07, 2014 | Hayward H Series Pool & Spa Heater 400k...

1 Answer

Error code A0

Just left of center inside the top of the front cabnit.(where the hayward label is) It's about 2 1/2" around and has two small hoses coming from it.

Jul 14, 2010 | Hayward H Series Pool & Spa Heater 400k...

1 Answer


The AO mindicates an open prover switch ,, here from Hawward site .
If the blower prover switch opens unexpectedly during operation the control will
shut down and attempt to re-light. If the switch does not close after the blower
starts the control will go into lockout with the blower running. Automatic reset is
immediate after error is corrected.

If the blower prover switch does not close after the blower starts the control will
stop the ignition trial go into lockout. The blower will continue to run. Automatic
reset is immediate after the switch closes.

May 08, 2010 | Hayward H Series Pool & Spa Heater 400k...

1 Answer

Pool heater will not ignite

My heater worked ok , btu made a clicking sound, now it shows a AO error? What can I do I dont have enough money to call a pool man again.

Jul 03, 2009 | Hayward H Series Pool & Spa Heater 400k...

1 Answer

Trouble shooting Hayward pool furnace

Big enough propane tank? proper pressure reducing valve on the propane? Check both of those.

May 30, 2009 | Hayward H Series Pool & Spa Heater 400k...

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