I have a 8x6 sef thats been giving off false signals so not used it for some time,yesterday i gave it a spray of wd40 on both pin and coil connections and would you believe it.... it works fine now.
Undo the the plastic nut at the coil and give it a good spray and then the pins at the control box end...
job done.
nearly binned the coil a couple of weeks ago.