Hyward H400ID won't ignite green light comes on for few seconds and then goes off
There are many questions needing answered. Is the fan coming on, if not it could be the fan proving switch. If the fan is coming on but the heater does not light there should be a code on the heater. I added a link to the manual for this heater. http://www.hayward-pool.com/pdf/manuals/H-seriesLowNOx-H250IDL2-H350IDL2-H400IDL2.pdf
SOURCE: green light comes on , can smell gas and hear
Make sure you have no soot build up on your ignitor. It will conduct elect so you can hear a buzz instead of a clear spark. Without a clean spark it wont fire and for safty it shuts down to keep gas from building up in the cabnit.
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