WORCESTER GREENSTAR 30CDi GC NUMBER 47-311-93 - Help please?

[spencerc]

Hi,

I have this boiler which is about 11 years old. Pressure is slowly dropping though after its set to 1.3 bars ( it goes up to about 2.4 as expected when CH runs then back down again )

I recently had some rads replaced and we had to drain the system.

There is now a constant drip every couple of minutes in the overflow pipe at the rear of the house and Im told this could be to do with a faulty/sticking PRV? Im also told its a bit of a sod on this peticular model due to its location? I cant find hide nor hair of how to do it or a youtube vid so dont know how to attack it?

all the bottom pipework is exposed and I can see it but its very close to the back of the boiler and at a right angle. We did try the flushing technique and dumped/pumped all the water out the overflow but didnt make any difference.

Anyone done one of these please? tricks? likely cost to get someone in?

Much appreciated!

 

[spencerc]

looks almost like you release the top clip and unscrew the bottom pipe and push forward but it would hit the wall?!!

thanks.

 

[muggles]

Sounds like your expansion vessel needs some attention as well - your pressure shouldn't be getting up above 2.0 with the heating on. A badly maintained, or failed, EV is almost certainly the cause of your PRV issue. And yes, it's a pig to do

 

[spencerc]

Would a bad ev let it drip even with no ch on?

 

[CBW]

Would a bad ev let it drip even with no ch on?

Not usually, but if the ev failed and the prv operated, then it might not have seated correctly.