Question about Hayward H Series Pool & Spa Heater 400k Btu Propane Gas Milivolt Ignition H400p1

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Hayward pool heater Model CZ 250 will not ignite

Heater will not come on when a call for heat is asked for.The igniter sparks okay but the main gas valve does not open to allow ags to the buner.Is it possible that the ignition module is shot?

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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

  • Kev McCauley
    Kev McCauley Apr 21, 2014

    make sure it is the ignitor sparking the hayward ignition wire is prone to failure it burns out at the ignitor end and the spark goes to ground before reaching the ignitor,


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Any one knows which pipe from filter or which one from heather goes to pool , hayward cz model, one in or out has a scrow on top

Posted on Jul 15, 2011

  • Kev McCauley
    Kev McCauley Apr 21, 2014

    the water comes into the front of the pump and out the top follow our plumbing from there



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bo = 'Bypassed Operation'
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Is this a millivolt or electric ignition heater? You can tell by the connections: gas only = millivolt, gas + electrical conduit = electric ignition.
Sometimes people ridicule us for asking the obvious, but I thought this would be helpful: 1) Are your operating the heater with the pump running? 2) Is the gas to the heater turned on; either at the propane valve (is there propane in the tanks?) or is the valve at the meter for natural gas in the on position.
is the code for ignition failure on Hayward Heaters. This could be related to a bad igniter or plugged burner orifices. Failure often indicates that the sensor wire to the ignitor is bad, rather than the ignitor itself. Inspect this wire, and if the sheathing is cracked or worn, replace it.

If the gas pressure and supply is OK, the proper order for parts replacement would be:
Sensor wire, then the ignitor, then the gas valve.
To inspect the igniter for operation, remove the igniter and turn the heater on and watch for a spark (don't hold it, you'll get zapped!). If you don't see one, try adjusting the spark generator relative to the metal ground around it. Clean out the area where it mounts as best you can.
We have serviced similar issues several times where spiders or debris actually kept the spark from reaching the gas.
Check here for manual and diagrams on all Hayward products

I hope that this helps! Please take a moment to give us feedback on the information that has been provided. We all volunteer our time and expertise to help you all out and th biggest compliment is the referral of your friends to the website and feedback from you!
The Ugly Pool Guy

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it is possible to light a pool heater with an ignition device,however it is not advisable.since your unit is calling for heat and the gas valve is opening,i suspect you have a faulty ignitor

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