Question about Hayward 100kbtu Pool Or Spa Propane Gas Heater H100idp1

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My heater won't ignite. There is power connected, the gas is flowing properly. I'm wondering if it is the igniter? How would I go about troubleshooting this to find out exactly what the problem is?

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  • adam hudson
    adam hudson Apr 07, 2011

    is this a high vltage model, or a standing pilot model heater? We need more info to help you.

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  • Hayward Master
  • 4,206 Answers

If not igniting but has voltage to gas valve bad ignitor

Posted on Mar 19, 2016

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Posted on Jan 02, 2017

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SOURCE: Won't lite, checked water flow and gas both good

could be the pressure switch.

Posted on May 24, 2009

  • 139 Answers

SOURCE: Hayward pool heater Model CZ 250 will not ignite

if ignitor sparks i'd say its okay, more likely a gas valve problem.are you sure gas supply is on and purged of air?make sure gas valve(the one gas supply threads into) is in the on position

Posted on Jun 21, 2009

  • 760 Answers

SOURCE: Hayward H-Series 200k BTU Millivolt Heater -

You didn't say what terminals you jumped, but I assume it's the flow switch, or it could be the thermostat. The flow switch is located on the piping inside the heater. This flow switch is very important because if you didn't have water flowing through the heater it would oveheat. These do go bad or sometimes just get stuck depending on what type they are. If it's the thermostat, mounted on the front pane you're jumping, then either it or it's expansion bulb is faulty. GOOD LUCK Who needs a heater in JULY?

Posted on Jul 03, 2010

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All appearances - No fuel to ignite!
evrything else looks good, proper gas pressure, proper volts at igniter, etc - it should ignite! If fuel present, heater should Fire!
make sure all valves are open.
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AND purge any air from gas line.
IMPORTANT ****. If you bled gas line, don't try to ignite for a few minutes. Allow gas to dissipate first, use a fan to help.

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Can you hear ignitor sparking when gas flowing? How did you confirm gas is flowing?

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My Electrolux Eog6330xn oven cuts out after about an hour and the ignighter then constantly sparks. the oven then has to be turned off to cool down before it will relight. Any advice.


Hello there Gary and welcome to FIXYA

Usually when an oven won't bake properly or stops baking , it's because the bake igniter is weak or burned out. The igniter is a small, round or rectangular device, that's about 1 inch by 4 to 8 inches. It's near the burner itself. The burner is the tube-type device the gas flows through before it's ignited. It has many small holes on the sides to let the gas, when ignited, form a long, low flame. If the igniter is weak, if it glows red but doesn't get hot enough, or if it's burned out, the gas doesn't flow to the burner and the burner won't ignite. If this is the problem, you may need to replace either the igniter or the gas safety valve. Usually the igniter is to blame. I would disconnect the power to the oven then unplug the wiring assy and remove the part then clean all of the terminals really good then reassemble it then try the oven again if it still does not work properly i would go ahead and replace that part ok
Please keep me posted on how this is going i can give you more help but this is the most common problem ok?
Best regards Mike

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Igniter can be ordered, but that may or may not be the issue.
Your tankless unit -and- plumbing system need total check-up by trained service technician.
Open following links for Bosch troubleshooting resources including contact Bosch, manuals, error codes, water flow etc.
http://waterheatertimer.org/Troubleshoot-Bosch-Tankless-water-heater.html
http://waterheatertimer.org/pdf/No-Error-Code.pdf
Check electrical outlet with circuit analyzer to make sure polarity is correct.
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