May 26, 2011 - I have a Hayward H400 IDPL2 heater - when we opened this year I got an IF . natural gas heater that was throwing the IF, ignition failure error code when red and flame sensor rod was pretty clean but I cleaned it anyway. Feb 24, 2015 - When it comes to troubleshooting Hayward pool heaters, there's not too much . Big difference, but other than that, they operate pretty much the same. And if you have Hayward heater error codes on display, that makes . Hayward heater 'IF' fault code as meaning Insufficient Fuel – though the IF code actually stands for. Ignition Failure. . swimming pool heaters are major roadblocks for many pool technicians. INSIDE: blue connector is pretty straightforward. Aug 13, 2012 - If it is milivolt then there is no electric, Must have correct milli-volt pilot . I have a hayward h-2001 natural gas heater that I wish to change to . May 24, 2008 - Help - Hayward Heater - Ignition Failure (IF) Problem . I don't know a lot about pool heaters, but I'd hate to call a gas guy and find out I forgot . heat your home — new woodstove designs burn cleanly and are beautiful to boot. when the pump shuts down the heater will display a fault code of 'LO'. If there is a . If flame is sensed with the gas valve off the control will go into lockout. The. Yes check with gas company to make sure you have bigger meter I had to change it to ffave out more gas to to the heater and make sure the line that going to ur . These Hayward pool heater troubleshooting codes and explanations will help . pool heat pump repair technician to inspect the probe, and replace if defective .