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Thanks Agile, Just want to get this issue sorted once and for all, I am going to spend time tonight tracing wires and draw a diagram and then hopefully doitall, D Hailsham and a nother can help me crack this issue and my family can be warm without having to have the hot watrer on max!!!

Thanks again doitall!! When I get home later this evening I will check all the wiring and draw a diagram and I will also see where the other side of the frost stat is wired to. Hope you will be online later to help me further as you seem to have your head around the issue?

I am in desperation mode as just want it to work to keep the wife and daughter happy without having the water on all the time and at 90 degrees!!!!

Yep DIP1 is definately set to Pumped as it show it on the LCD display The boiler has a single live feed to it that comes live when the boiler is needed. The Pump, Boiler, Orange wire from Valve, Wire from Terminal 1 on the Cylinder Stat and a wire from the Frost Stat (next to boiler in...

On the back of the programmer there are 4 dip switches as detailed below: DIP 1 - pumped / gravity this is set to pumped DIP 2 - 3 on's / 2 on's this is set to 3 on/off cycle DIP 3 - 7 days a week on or off this is set ot off DIP 4 - 5/2 days on / off this is set to on...

doitall - yes I do have a multimeter and the readings are: With HW and CH both turned off on the programmer there is 240v on the grey wire and no voltage on grey or white. I have then turned CH on only on the programmer and the room stat right up to max, the valve has moved to the CH only...

Can you see it making any difference that the Room Stat is a Sunvic Digital one meaning it only has two wires connected to it so it is not giving out the correct voltages.

I was at first thinking along the same lines as you but when the second electrician looked at the wiring and tested he confirmed that there was 240v to the boiler when HW was running and when CH was running independantly. There is only one live feed to the boiler that is live no matter...

Thanks Mandate, The voltage at the boiler has been checked to be 240v, I do not have a permenant and switched live at the boiler, there is only one live which comes "live" when feed from the orange wire from the valve to the pump and boiler. I have a Glow Worm Ultimate 60BF which is a very...

Thanks Mandate for your reply but as I have mentioned in earlier posts I have had a seperate electricain test all the wiring and components and I am getting 240v on all connections as and when required. When the valve moves to the final CH only position the pumps fires up and is getting 240v...

Photos as requested Doitall - hope you can see the problem from them!!

The boiler and pump are indeed connected to the orange wire. As I mentioned a qualified electrician has had a look and traced/tested all the wiring and it is as per Y-Plan. I will bleed everything again, am I right to assume that if there was no return on the heating side there would be no...

Thanks Kev for the troubleshooting diagrams but all tested and OK as checked by a qualified electrician.

Thanks doitall and Mandate, All the wires are connected correctly as you suggest and to the Y-Plan diagram. I have today had an electrician test all the voltages and I am getting 240v at all points and even getting 240v to the Boiler live feed when in CH only mode or HW/CH and the HW...

Thanks for the docs Kev, I will look at the troubleshooting flow chart although our boiler does not have a fan and no circuit boards in the main controller. Will let you know what I find.

Thanks KevPlumb, emailed you at the address in your profile If you could send me the PDF that would be great, will it help me solve the issue?

Yes the grey lead is connected the cylinder stat but cannot remember the terminal number off the top of my head will check later I will check the voltage on the White and Orange wires - any other ideas if they are both 240v?

I have a multimeter so can test the values on each wire if that will give more of a clue to the issue, really want to get it resolved and working. When the valve is in Heating only mode the Live feed to the boiler is Live (again tested with Mains Tester neon screwdriver but not tested...

Thanks for the reply doitall Yeah the valve is fitted the correct way round, AB to the Pump, A to the heating and B to the cylinder When the valve is in heating only mode there is power to Orange, White and Grey. I have not tested the voltage value just the fact that there is power using...

I am hoping that someone will be able to help me with the problem I am experiencing with my Central Heating system. I moved into the house (4 bed Detached) 6 years again and the system has never worked properly. I have a Glow Worm Ultimate 60BF boiler, Wilo Gold 50 Pump, Honeywell...