3 Port diverter valve

[sharky6866]

I had a problem with the central heating sticking on when the timer turns off so I have investigated this by checking the 3 port diverter valve (BGMVSP-23) the motorized valve works perfectly in operation when taken off so ok.

The brass valve with the spindle was extremely difficult to move so I put some wd40 on and began to manipulate it until it became free but I believe that the spindle has broke due to it being so stiff, now I can turn the spindle all way around by hand but I believe you should only be able to turn it from the 12 o clock position to the 3 o clock position, could anyone please confirm this for me.

 

[cross thread]

service kits are available for this valve

 

[sharky6866]

service kits are available for this valve

The head is fine but the brass valve spindle turns freely around 360 degrees does this mean it is broken or do I need a new brass 3 port valve?

 

[Elkato531]

I'd take the opportunity to replace for a Honeywell valve. The Drayton ones like yours are terrible for sticking and you'll more than likely be unsticking it every few months. Incidentally, WD40 is not the stuff to use. Its an oil based degreaser and will only lubricate short term and will damage internal o rings. Silicon spray is the stuff to use.

 

[cross thread]

the service kits are for the base and only a few pounds

 

[sharky6866]

I'd take the opportunity to replace for a Honeywell valve. The Drayton ones like yours are terrible for sticking and you'll more than likely be unsticking it every few months. Incidentally, WD40 is not the stuff to use. Its an oil based degreaser and will only lubricate short term and will damage internal o rings. Silicon spray is the stuff to use.

Do I need to drain the system?

 

[cross thread]

yes unless your valve has isolation valves