potterton mf rsl 50 programmer

[markthesparky]

Wonder if anyone can help I have a fault with a kingfisher mf boiler. The time switch for the hot water was not cycling on so changed it now it stays on all the time.The system is gravity hot, pumped heating with no room stats or cylinder stat. Also no diverter valve. left scratching my head at the momment

 

[baxpoti]

Did you change like for like?

6" x 4" grey or 2" square white

If grey one..............

Did you set the programmer to gravity (large white screwdriver slot on back turns through 90°).

 

[markthesparky]

yes changed like for like 2" square and switched the 10/16 switch to 10 as was.The programmer is on in all positions of hw,etc the off position.The old programmer would not work in the timed position or once.

 

[baxpoti]

Press and hold + and - for 5secs to reset

 

[markthesparky]

Cheers I will give it a go

 

[markthesparky]

I have tried reseting the original programmer and now that is on in all positions except off. The heating side works fine still and the problems only started when the heating side was switched off for the summer.will try with the new programmer but don't hold out much hope I am totally puzzled the programmer only has mains in and sends out the signals to fire boiler and pump when required does it not why would 2 develope the same fault? or is there more to it than that?
all help gratefully received.

 

[markthesparky]

how thick am I got a copy of the programmers instructions and now I know how to set up the hot water program. the thing works fine now