I have a Hayward H350FDN machine, it worked fine for about 4 years. Now it will not catch fire and no error code. During startup, when the gas valve is normally activated to open, the fan motor seems to flicker and run slowly. I tried everything to fix it. I have also asked many on whatsapp groups and communities about Hayward H350FDN but still can't find a way. Can anyone point out how to help me , or share a link to this article to anyone who can help me .