So I've got a pentair minimax nt, and turned it on last night to heat the pool for the weekend. Woke up this morning and I'm staring at an error message: E04, which according to the manual means there is a fan failure, but when I power it down and power it back up, the fan is coming on, I can smell the gas, it's just not igniting. Feels like an ignition problem, but then again, I don't know anything about pools or heaters, so that's just an uninformed guess at best.
I opened it up and did a hard reset, but to no avail. Did not work.