The POTTERTON 7211473 ELECTRONIC PROGRAMMER EP2 is a genuine, brand new Potterton Boiler Spares product, covered by a Potterton Boiler Spares manufacturer's guarantee. Most purchases from business sellers are protected by the Consumer Contract Regulations 2013 which give you the right to cancel the purchase within 14 days after the day you receive the item. I also have a spare backplate with just a mains connection on it and the locking part of the catch filed off so that I can set the programmer up on the table as it is too awkward to work in the airing cupboard and of course the memory battery holds the settings.

Praise the Lord, I had visions of having no hot water and a grumpy wife nagging me to get a whole new boiler for days. It also has a backlit display which is great to see in a dark airing cupboard and the backup battery is a readily available CR2032 instead of the previous specialist or soldered in ones. A direct replacement for my old worn out EP2002, easy to remove, simply pop a flat screwdriver into the small slot underneath and lever upwards. The only thing I found was that the back of the EP2 sticks out more than its predecessors and where I had wiring crossing the central vertical support of the backplate, I could not fully close the programmer onto the backplate.One note however, the EP2 face plate has a tiny screw on the lower edge that is screwed in from the underside to really lock the faceplate in position. Had to push it down quite hard to lock it in place, as the wires behind had to be pushed back, but it sprang into life when I powered back up, and after I'd programmed in the ons and offs took over where the old had left off.

We took off front cover of old one there was wiring underneath god we thought we would have to redo wiring but we didn’t the cover off new one just pushed in and straight away the boiler fired up. Will have another go later tonight but have left the on and off times for all seven days of the week. And an easy DIY job - no plumbing or electrical expert required if you've already got a wired-in Potterton back-plate. The new one has the same contacts into the existing terminals on the backplate - there is also a new backplate provided if you need one, but my old one looked fine so I simply pulled out the battery protection tab, snapped the new programmer back onto the old backplate, switched it on and started programming it according to the instructions. This EP2 can be programmed to clone the actions of its predecessors the EP2000 EP2002 EP3002 and EP6002 as well as being fully programmable in its own right.Instructions good, but you also need to use the supplied installer instructions to get it working right for you. The Potterton EP2 Programmer can be used for replacing existing older Potterton EP2000, EP2002, EP3002, EP6002 Models using the existing backplates with no rewiring necessary providing the existing backplate is not daMaged and in good condition. Some mention that it is expensive and bulky, but it works as expected and is a great improvement over the original. I have no special electrical knowledge but based on my background reading I just switched the power off at the mains, swooped the controller, and switched the power back on.