I have a Hayward H400FDN heater. When I first tried to start the pool this year, I got an LO error and it would try to start, the igniter would click, and it wouldn't start. I back washed the filter, and then tried it a few days later and it worked. I haven't seen the LO again (except when the heater is off that's what shows on the display). So I used it a couple of times over the last month or so and it worked fine. .Then earlier this week, , It fired up and stopped 5 seconds later 3 times then threw an IF error code. I let it sit a few minutes, turned the heater to standby and back to spa, and it started and worked. Now today, I started it, it starts the main burner and about 5 seconds later it quit, and after three times I get the IF code. This time when I turned it off and back on it tried 3 times again and again gave an IF code. So the LO code only showed up the first time this year, but the IF code shows up sometimes, but sometimes it starts. Maybe backwashing fixed the LO code and it's not related to the IF code, but sounds suspicious. What could cause this?
Steve
Steve
