I know this is a bit late ,but I had the same problem with my boiler last year.
You require a Danfoss FP 715 programmer,it is a bit smaller in size than the original,and you will have to reconfigure the wiring slightly, but it works a treat and costs a lot less than the original.I paid £35. 00. mail order, from Screwfix Direct.
Ian.
Ian
September 2007