Oh dear Boo.....You didn't read my post properly...BTW, what electrician in the shop?
I will do as @davenn did...
IT IS NOT A 15A FUSE. It is a 3.15A fuse..Let me spell it....
Three point fifteen amp. (point being a .)
Replace with a 3.15Amp and cut R4 out. R4 is causing a direct short.
Once it...