powermax 155x No CH

[Archietri]

I Have hot water but no central heating. Pumps are fine but no feed to the CH one. Overheat sensors are ok. The two red neons for HW & CH on the front of the timer seem dimmer than they were when the heating worked. Room stat ok but no 'below' or 'reached' temp. neons lit. That's about the limit of my invesigating knowledge! I think it mabe the timer control unit, but before I fork out for one, does anyone have any ideas? Please help. Thanks, Archie.

[woodchopper]

I'm having a guess as my memory of the wiring diagrams for these type of timers is a bit rusty - here goes -there should be an output from the timer to a motorised valve somewhere - check there is - if ok I would suspect the motorised valve is faulty - there may be a manual overide on it - try it manually and see if that works.