Thanks guys for all your great GI info, 3a sb no good, swapped it out with a 5a sb and problem solved. 
Yep, that will do it.
If there isn't a list of fuse values in the backbox, check your manual if you have one. If you don't have either you can download the manual easily from the IPDB or someone here will be sure to have one they can email to you.
