h250fdn if

  1. AtriosM3

    Hayward Pool Heater H250FDN - Heat Exchanger Troubleshooting with IF code

    Hi TFP Community, I’m experiencing issues with my Hayward H250FDN pool heater (Natural Gas). Despite replacing the igniter, flame sensor, control board, gas valve, and gas pressure regulator (adjusted with a manometer), the IF code has returned after a year. The heater turns on for 1-3 minutes...
  2. M

    Hayward H250FDN IF Code

    My heater worked flawlessly from 2009 to about 2021. I was battling first an IO code and then intermittent IF code and replaced both ignitor, fixed IO, and flame sensor with no change intermittent IF results. I suspected a heat exchanger leak due to some small about of water (not much) from...