The 4033 programmer allows you to switch your hot water and heating on and off at times that suit you. Four tappets on the timing dial let you decide when you want your hot water and heating to come on and go off each day. The programmer provides 2 ON times and 2 OFF times per day.

Using two simple switches you can run your Heating and Hot Water independently of each other, either at the set times, constantly ON, constantly OFF.