I purchased an 8 year old home a few months ago with a pool. All was working well until I fired up the filter pump yesterday and noticed the water level in the pool dropped after just a few of hours. After looking around I found the Pentair Mastertemp 400 heater was leaking quite substantially. I opened the side covers and found water pouring out of the 'air orifice grill'.
I haven't delved into it deeper yet as I wanted to get feedback about whether this is a common problem, and if there are any possible solutions. I get the feeling this isn't going to be easy or cheap. Thoughts?