I just had to replace a pool heater after 4'years because the thing kept breaking every year. I turned it on when I left for work this morning so it could run all day and a half hour ago it started pouring rain. It's down to a drizzle now but I was wondering if that would hurt anything. My last one was so fickle so I plan on babying this new one. I've googled the question and all I get are answers about running the pump when it's raining (which I do because it's on a timer), but I want to be sure about the heater. I figure since the heater is outside all year around it shouldn't be a problem but I would like some verification. It's a Hayward Swim Pro and it's an above ground pool. Thanks