Hoping someone can help with this:
We have hot water but radiators aren't getting hot. I've done a bit of googling and am fairly certain the Synchronous Motor has failed as if I wedge the valve on the Honeywell Sundial Y Plan 3 position diverter valve v4073a1039 open, the radiators get hot.
Now I'm guessing changing the whole valve will require draining of the system etc but will just changing the motor work? Will I not need to turn anything other than the electrics off for this? How simple is it? I've found the motor for about £12 delivered.
Any help would be appreciated as I don't want a plumber ripping me off if this is fairly simple.