Can I fix my tumble dryer myself?

I have a Hotpoint CDT00 condenser dryer, about six weeks ago it started to sometimes shut off the electricity half way through a cycle and other times it would work as normal and it would always switch back on if I left it for a few hours. Yesterday it cut the electricity so I unplugged it and left it overnight but when I tried to turn it back on today it cuts the electricity every time. I know that it's shorting but has anybody got any advice on what this might be, can I fix it myself and if I can't how much will it cost me to get it repaired?