@phaedrux I think I figured it out... I bought sensor #1 Feb 28th, 2018 and sensor #2 on August 1st, 2018.
Had always used sensor #1 and had it working for approx, 2 months? Then I moved and it stopped working. Just switched the sensor out with #2 to see if it would work and it activated correctly above the bed surface and is printing which is a HUGE relief. Thank you so much guys for your help, I will let you know if this was the end all be all solution.
@dc42 Sensor #1 was activating the lights twice, once at approximately 6mm above the bed and if I turned axis limits off it activated again at the correct height. Is there any reason for this or is it a dud sensor? I can take a photo of both next to each other for you. They both say they are V1.3 on the rear but the #2 board has no diagnosis holes right of the chip, and the holes (right of R1 and right of R3 are soldered up).