On board bat ram clear and svt m151 clear should give similar results . If you changed the button and the remote station and still have it then it could be a problem in the software where the output for the tell tale light is permanently on . If you get yourself a service tool check the I/0 state , it should give you the I/o number in the prints I've had this fault but its been the behind COP remote station ( KEB ) board everytime . The light and fan relay is a changeable setting from the last run and can be changed with a SVT .