Now that it's summer I want to turn off all the rads from the boiler. However I thought I turned them off from the boiler by turning the dial off which has a picture of the radiator next to it and left the one with the tap on next to it as didn't want to turn down the hot water coming out the taps and for the shower. However, the water from the taps etc turned cold. So I turned the dial back on which has the radiator next to it and turned the dial off which had the tap next to it and the hot water from the taps is back on. Not sure if the radiators will turn on the next time it gets cold enough in the house though, hopefully not? Or am I totally doing this all wrong? Please see pic.