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Update. new 0.68uF cap fitted today. This produced 10v across relay (ON when 'Demand Heat') so still not enough volts. I have re-fitted original cap. in parallel with new cap. Volts now up to 15.2 & relay now works! something in the circuit (too small for my old eyes) must be taking to much...

Hi Andy - Yes, The fault was/is with the 'Drayton Digistat SCR' receiver not operating its on-board relay (should be about 24v but found to be less than 6v). I read on the web that this is a common fault that can be fixed by replacing the 0.68 uF 275v ac rated capacitor that supplies it. I have...

gasservice1985W - When you said bypassed, you've linked internally at the boiler? I have linked the boiler 'Ls' & 'Lr' connections in the boiler to bypass the timer.

"mcmoby69" - knob in winter position? broken maybe? I am a Scoucer Sir! My knob is not in winter position. I agree with your comment however. I am trying to get my C.H. working for a Yorkshire winter. Stat & timer have been by-passed. Still won't go. I am running the C.H. in diagnostic...

No. That was removed along with the tank in the loft when the combi was installed. I don't know what to try next.

Yes it does. Shows red light 'on' - call for heat - when sensor set to 30 C shows no light for 'off' when sensor set to 10 C (room temp is 19 C)

Thank you both for your quick feedback. New batteries fitted 1 week ago. Room temp was 19 C RF Stat is set to 30 C I can see 'receiver' working aprox. every 5 mins. Time switch is set to 'Over-ride' (red light on) so this would ignore any stat fault anyway. I will go in to boiler and link...

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Advice please re: Worcester Greenstar 24i junior about 4 years old. Problem: No Central heating. Current status: System re-pressurized from '0' to '1.5' bar after approx. 3 months not used. Digital Timer on 'override' (calling for heat) Hot water was & is OK All radiators get...

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