Mine says 5 amp

WW fuse.jpg

While you are waiting...IPDB manual shows F1 to be a 5A SB on both parts list and schematic diagram for C-13088 triac board. Marco replacement triac boards for Whirlwind are stuffed with a 5A SB as well.

I'll preface this by saying I don't have a WW.

What are the dates on the front of your manuals? I would always go for the later date when looking at things like this.

The manual on IPDB says January 1990. http://mirror2.ipdb.org/files/2765/Williams_1990_Whirlwind_Operations_Manual_Br_With_Schematics.pdf

I can see why this would be confusing.
Page 40 says the fuse on the triac board should be a 5ASB.
Page 50 says the fuse on the triac board should be a 1ASB.
Page 80 says the fuse on the triac board should be a 5ASB.

But GLM sells the replacement triac board with a 5ASB fuse (which is the board Marco sells):

http://www.greatlakesmodular.com/index.html?http://www.greatlakesmodular.com/products/pinball/sy11tb1.html

So I would say 5ASB is the safe bet.

You also have to make sure you put the correct fuse on the aux power driver board. I think the sticker in the backbox says 2.5ASB for F1 but the manual and others have said it should be 5ASB and that the sticker is wrong.

viperrwk

Did you ever have another problem with your fan?? just curious cause im having this exact issue and need help. put 5amp fuse in triac board, works for 15 games or so then blows. havent checked the aux board yet.