Has anyone had a pool heater installed or repaired? We have a very old gas pool heater that is not working. We have replaced the display board and that seemed to fix it but it's not lighting now. We replaced the ignitor and that didn't work. We think it's the circuit board (control board) but because it's so old we're having trouble finding that part (and finding the time to fix it). Does anyone have someone that fixes pool heaters? Or installs new ones if we decide to go that route? Thanks!