I accidently left my Rheem pool heater on after I went to bed last night. My pump is on a timer and shuts off at 11pm but I wasn't awake to turn the heater off. This is one of their basic heaters (not digital) but it has an automatic shut off if water stops going through it. Could this have damaged the heater at all? I turned it off this morning but I am nervous that may have caused a problem. Thanks!