no power in boiler?

I have a glow worm flexicom 30cx which sprung a leak during the cold weather. We found the leak and thankfully fixed it by just replacing rubber a washer. How ever when we turned power back on something blew in and around the pressure sensor. if it was the pressure sensor would this stop power going to the lcd screen and boiler or would there be any fuses in boiler i could check out. Any help would be much appreciated as i havnt got the money to replace the boiler like my plumber has suggested. thanks