Originally posted by: ess39
I'm considering changing my boiler controls from a clockwork type to a digital one. I specifically want to be able to program on/off times on different days and have an 'advance' button for central heating. My boiler is a Worcester Greenstar 42CDi and the current controller is a MD10. How much would it cost to supply and fit a replacement? The current setup has a wired thermostat in the hall if that makes a difference.
Hi. you need a DT10 optimiser,