A few months ago, we had a power problem at our house. Lost the neutral feeding the house. I discovered that the 30 amp 2-pole GFCI breaker that feeds the heater on my Tiger River was tripped. I replaced the breaker....it tested bad. Since then, the breaker will trip at random. I can go for weeks until it trips. No logic as to when or why. I put a clamp meter on the heater and it is pulling @ 27 amps. That's a good number. What am I missing as to why this happens at random?