im having trouble starting my heater. please see issue below, any thoughts/ ideas appreciated. thx
its a 6 year old in-ground pool, 10000 gals, sw pool, natural gas heater.
when pump is on the standby light is on and heater looks happy. i press the mode switch to start heater and nothing happens.
when pump is off the service light and standby light are on and LO is displayed.