Did a little job last week, a shower in a 30A 3036 Wylex board. Fuse blown, 15A fuse wire had lasted 4 years before slowly burning itself out. Change the fuse wire only and quoted for a board change and off I went. Got a call from him this evening saying that after tonights shower his wife could smell burning coming from the c/u! "I'm on my way" jumped in the bat mobile and there in ten mins. Just as the man said it was starting to burn the plastic finger guard for the shower fuse. The guard was a little bit loose (i didn't touch it last week) and the brass was making contact with it. Also the kitchen was very humid after they did a couple of loads of washing and there was a bit of condensation on the fuse case which would not have helped. Anyway its sorted now and I had the shower running on full temperature for a while and no heat or burning so job done until he can afford a c/u change (he's getting married next month). Gave him the option of a 2 way rcd c/u for the shower and cooker as a temporary measure, giving him a price for that tomorrow. Question is would you have charged for this call out? If it was anything to do with my work previously of course there would be no charge but nothing I did would start burning out the fuse? Your thoughts please ladies and gentleman.