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Thanks. I stripped, cleaned and re-made all the connections both on the wires to the back plate and also the pins and slots etc to the point they were all solid and pristine and things have not improved - till flakey and random, making me feel that it is fact the timer that is faulty?? Perhaps a...

Thanks for the reply - it's a Drayton Tempus Six - this exact one... http://www.gotogasdocs.co.uk/f/m/Drayton/Discontinued%20Products/Tempus%206%20Installation%20&%20User%20Instuctions.pdf Does that ^ influence the heating only issue? (the dip switches are set correctly on the rear). If I buy...

Thanks for the reply - money is very tight so I'll just buy one for the time being. Could I just ask regarding my heating only question - is it correct to be able to just ask the timer for central heating (whilst the hot water side of the timer is off) and the the system to fire up the boiler...

Update... My brother-in law is an electronic engineer and whilst not a central heating expert, came round for a few hours and with the wiring diagram and some kit, went through is all, testing along the way. What he discovered was that the wiring was fundamentally correct and the cyl and room...

Thanks for your input. Still not working, and I cant afford a plumber/electrician at the moment so I'm having to muddle through as best as I can. The comment earlier about the 3 port being a red herring and that the cyl thermostat being a key element interests me and stimulates my logic, so I...

I think you might be right..... if stopped working again. I pulled the motorised head off the valve, messed about with it, moved the switch from auto to manual and back as I did last time (this time it was not loose) and nothing made the pump come on - no amount of fiddling did anything. I...

Indeed. On reflection, it was probably more like 30-40 degrees, but no more, with the spindle hitting a definitive and solid 'stop' at the end of each travel, met with a fluid 'thunk' as flow stopped or opened, leaving me to feel this was 'correct'??

Thanks for the replies everyone - it's now fixed and working correctly, but rather frustratingly, I cannot pinpoint exactly what was wrong, other than by fiddling with the honey well and manually moving the clock work mechanism against the springs whilst also manipulating the physical valve and...

Quick update - found the valve number - V4073A1039 Managed to remove the head from the valve and I can manually adust the vlave by hand (it only turns about 20 degrees, normal?) When I turn the valve (with the pump running after prodding the micro switch) there is a clunk in the pipes (fluid...

Thanks everyone for your replies so far. (It's a Drayton Tempus Six Timer) Latest findings... (with all stats turned up to max on boiler, cylinder, room stat and timer set to request heating and hot water) I removed the cover of the 3 port Honeywell valve (no model name or number on it...

Valve actuator issue - the honeywell? When powering it down, do you mean the boiler? I've switched the boiler on and off a few times and reset it, but it doesn't make any difference. I can hear a little click sound when the boiler switches on. I've not looked at the honeywell yet - last time I...

I have a traditional gravity, pumped CH system, tank in the loft, cylinder in the airing cupboard, digital thermostat in the hall way, electronic timer in the kitchen, Greenstar Ri boiler in the garage in a two story house - all fairly typical. Boiler is about 5 years old, as is the pump and...