My water heater has error code 2 blinks with 1 second pause then 1 blink with 3 sec pause before it repeats. I was able to reset it 4-5 times but now it's just stuck on that code and will not fire up. Blower turns on but that's it. I have checked and blown all vents, I have gone through a thousand posts to try diff things. Any help would be much appreciated!!