if error

  1. T

    Another Hayward IF Error - Possibly Gas Valve

    Hello, I have yet another dreaded Hayward IF error. I feel like I have tested and replaced just about every component in this heater over the last couple years. This is a H300FDN that is about 11 years old. I replaced both control boards two years ago. So far I have verified the Ignitor is...
  2. K

    Hayward 350FDN IF code

    I have a Hayward 350FDN, it was working earlier this year and now gives the IF error. I had our gas company come out and bump up our supply from the meter and replaced the flame sensor. Still get the error. I can see through the sight glass the igniter turn red and flame for a short time (3-5...
  3. M

    Hayward H400FDN Natural Gas won't ignite

    Hey everyone- I am at a loss with my situation and looking for some help. I bought a brand new Hayward H400FDN natural gas heater about a month ago. Installed it and it fired up just beautifully. Ran for probably 5 hours and went out. Could not get it to light again the rest of the day. It...