I recently bought a house with a pool. The pool was built in 2003 and all the equipment is original. I keep having issues with the pool heater. It is a Pentair Minimax NT, 250,000 BTU's. At first it would not ignite. So, the pool guy recommended I replaced the ignitor. I did and it worked perfectly for a week. Then the it stopped working again. I removed the ignitor and the metal spot at the end had fried off. I replaced the ignitor a couple more times with the same result. I don't even know where to start from here. Being as the pool heater is 13 years old I don't think I should start to throw parts at it to try to resolve it, unless I know that it will fix it... The ignitor has 70 amps going to it.