A few months ago we had our boiler changed. Half the radiators in the house stopped working. We let the plumber know before he left and he said that he would sort it out and that it would only be air in the system. However he left and only came back months later (after being chased) to sort it out. He said that it was complicated to resolve as the dirt had calcified in the pipes and charged us £500. I'm wondering if it is a fair charge or if we are essentially paying for something that he had messed up in the first place and potentially made worse by failing to sort out immediately. Any similar experiences and can i have your thoughts?
thanks