Recent content by gadget_buster

does it sound like the servo valve is not changing over the flow to the other chamber in the diverter?

When you say the spring completely at rest do you mean that the pin on the side of the diverter valve should be in fully so the spring is at its longest? if that makes sense? Sorry for sounding an idiot but it is as if there is too much pressure building up on the DHW side of the diverter...

Is there anyway i could check to see if the pump is producing enough pressure to create the required hydraulic pressure in the diverter valve? I can definitely hear the pump turning if i listen with a screw driver to the body of the pump.

I’m still having a few problems with the CH, there does not seem to be enough hydraulic pressure to push the diverter value in and therefore give me CH. If you aid the diverter value in with a push and the micro switch makes contact then the CH comes on and stays on for a while, but the diverter...

My boiler has been working fine for 8 days but yesterday and this morning the heating has failed to come on. The thermostat in the house and switch are both demanding CH and the boiler has the fan and the pump running ready but the diverter has not fully retracted in to the position it needs to...

Wow, i checked the control lines and the one that goes from the top of the pump to the bottom servo was blocked :D i have got to check things over as see if it all works ok but so far so good. I doubt whether i now needed to buy a new servo and diverter but at least it is running Many...

I have a Vaillant VCW 242 running on mains gas; I have had a bit of an ongoing problem with it. The problem is that on request for CH the diverter valve does not move and therefore I have no CH, I have fitted a new servo valve, the DHW did work. Yesterday I fitted a new diverter valve and now...

I've got it working now Hurrah!! There was silt and scale in most of the parts i stripped down but finally after doing as i was told and stripping and reassembling the servo valve its working. I did inadvertently buy a new heat cut out switch on the recommendation of someone for £25 quid...

OK so if the servo works for the HW does that mean it is working ok?

!! RIGHT !! So i'm going to get a new boiler then, hey! Any one got any good recommendation for a combi? Maybe one that is not over engineered One that is user friendly One that can supply my three bedroom end of terrace house with one bathroom but two kids and a missus Many...

on stripping down the diverter valve and closer examination, is the valve meant to seal the pipe that leads to the heat exchanger fully when CH is demanded? or does it use pressure on the other side of the diaphram to fully seal the line to the heat exchanger? if not the i dont think the...

if the servo vavle is the little triangular device in the middle front of the boiler that has three copper control lines going to it and the device turns a cam that makes contact with a microswitch behind it, then it is only operating when the DHW is demanded, when the CH is demanded the sevro...

Many thanks for your help So would you say there is a problem with my diverter valve then if it goes out for both CH and DHW? If i was to strip the valve and check the control lines are not blocked do you think that would help?

A supposed competent corgi registered vaillant expert said that the resistance should be that, i am only acting on advice i have been given, that is why i went down that route of questioning, after all i was told it could be one of twenty things. I feel a little trodden upon here, i have...

Sorry to be a right pain in the arse, but could you run through the sequence of operation for hot water and CH for the diverter/servo valve, would it be the same for both. When i run the hot water tap the probe from the valve comes out and releases one of the two microswitches, (the other...