Hello out there. I need help!!! I have a 4 year old Pentair MiniMax 400 pool heater thats warranty just ran out, figures!!!! Heater will not fire! AFter 4 months of not using it I decided to use it and it never fired up. I opened up the panel and turned it on again and noticed that the ignitor was working, could see the red glow. The led panel showed that the heater led light came on and shut off after a few seconds as well as the red glow. With the blower running fine it tries to fire up again a couple of minutes later and same thing happens. After 5 minutes or so an Error code EO3 comes on. Thermal Fuse Open is the code!!! I replaced the Thermastor, 115* and 150* and thermal fuse on front panel. Still not working. Anyone have any suggestions before I call the pool co.? Thanks a million