Question about Hayward H Series Millivolt 250,000 Btu Pool Heater H2501

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Hayward mod h1501 light pilot it stays lit turn temp up and it run,s but when we turn it down and shut it off the pilot go,s out and we have to lite it every time we use it,s out. a new gas valve in will still do it. put a new thermal couple in will still do it. put a new blow back sencer in will still do it.clean all connection,s will still do it. do you know what is wrong. HELP HELP HELP. JIM HARLAN

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  • Hayward Master
  • 1,378 Answers

Check the burner tube closest to the pilot side of the burner tray. Is it burning a nice blue like all the rest? If it is not, clean out the jet on the manifold in front of the tube.

If it is ok, can you get a millivolt reading off the generator (thermocouple)? If so, get the reading with just the pilot on it, then with the burner load. Finally, watch that reading as the burners run for a while to be sure it climbs.

The only other thing I can think of would be to get manometer readings to verify gas pressures before and after the valve.

Posted on Jul 30, 2009

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Posted on Jan 02, 2017

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1 Answer

Per landlord, need to light pilot


You would smell the gas, so you're probably ok. Lighting the pilot is not too tough, first you have to get the cover off the furnace. Inside you will see pipes and parts. Hopefully on the cover, inside or out, or somewhere inside the furnace will be instructions.
If not, find a knob that has 'pilot', 'off' and 'run' or something like that. It will probably be in 'run'.
Usually, you have to push the knob down and turn it to get it to the 'pilot' spot. When you do, have something to lite the pilot, which will be inside the furnace more, near the burner. The burner looks like a gas stove or oven burner. The pilot place will be at the end of a small tube.
With the button held down, wave something burning around the burner area. especially at what may be the pilot. The pilot doesn't put out much gas, so don't worry about things blowing up.
Once the pilot has lit, hold the button down for a while, at least a minute. Then you should be able to release the button and the pilot should stay on. If it doesn't, you need a serviceman to come. Let the landlord know the pilot would not stay lit.
If the pilot stays lit, move the knob to 'run' or such, and the furnace should lite, if the thermostat is set higher than room temp. If it has been off, and the room is cool, it should lite.
If the furnace doesn't come on, let the landlord know.
Most landlords have service people for this, it was my job for a long time. Lighting pilots was a common chore for me. If you can, have the landlord send one out to show you how to do it.
As you see, it's not all tough, but it's not all easy, either.

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Your problem is the pilot generator where the flame is by the burners. This needs to be repalced. That is what is causing the pilot to go out and not start. It is a flame sensor and also tells the gas valve when to release more or less gas.

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