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Cheers Mandate, I will give it a go. Out of interest, can anyone tell me what type of valve is used in a 3 port valve? I'd like to at least try and understand how one could fail due to wear/sludge :|

So with power connected this doesn't happen and when removed the valve head/actuator works so it has to be the actual valve that's at fault?

I can turn the spindle freely, although it has very limited movement - aout 10 degrees I'd say.

So when I switched off the boiler to remove the valve head, the manual switch should of returned to the HW/rest position? Or with the programmer switched to HW only, it should also move to this position?

Ok just checked this on the kitchen radiator, on the opposite wall to the boiler (programmer is on boiler). Put the programmer on HW only and felt both pipes on rad, as soon as one started warming up I quickly switched programmer to CH and HW (it's a basic programmer with just HW or HW and...

Thanks for the quick response Dan. So the fact that the manual lever on the valve doesn't return to the rest position does not necessarily indicate a problem with the 3 port valve? This plumbing and heating mullarky is all new to me having just got myself on the housing ladder so excuse...

Evening everyone! Looking for some advice regarding the Honeywell V4073 3 port valve. When the HW is on the CH is on too. I have looked at the valve and the manual lever is not returning to the rest position. With the valve head removed the lever can be operated under firm pressure and will...

Thanks for the reply boilerman. The existing programmer is very similiar to this: http://cgi.ebay.co.uk/Thorn-Apollo-Programmer-Kit-(Grey)-B4161_W0QQitemZ220630572342QQcmdZViewItem?rvr_id=155293182059&query=%7Bquery%7D&fitem=220630572342&linkin_id=8060231&mt_id=635&kw=%7Bquery%7D Only...

Hi all, really hoping someone can give me some advice. I have a Myson Apollo Fanfare 15/30 boiler and the clock on the programmer has stopped working meaning the CH/HW has to be turned on and off manually. I believe it is possible to replace the programmer with a digital one? Such as one...