I have a 14 month old Hayward natural gas heater. It has been use lightly, maybe 5-6 hours total. It just started acting up. I can turn it on and it will be fine then later I will notice that it has a CE code. Sometimes the code goes away and all is fine. Sometimes from the code the display will just go blank. We turn the heater on each day, but mainly to see what the water temperature is. My husband took the cover off, didn't notice any loose cable connections, etc. and it worked fine for a day or two and then started the intermittent normal display, ce code or no display at all. Any ideas?