Sime Friendly Format 80e DHW Problems

Hi,

I have inherited the above boiler with the house I bought.

All was fine till recently, after I moved a rad in the bathroom (hence draining system) the heating works fine in all rads, but DHW seems to be fine if the Roomstat is calling for heat.

But if the Roomstat isn't calling for heat then obviously the boiler isn't firing. When I then turn on a hot tap the boiler fires for about 10 seconds or so, then ****s off. This doesn't happen with the bath tap or the kitchen tap which both operate the boiler as they should. It's only basin taps, and the thermostatic shower that causes this problem. It seems as though the boiler isn't detecting the flow correctly.

Any ideas?

Rubber Diaphragm in diverter valve - they split.

Thanks for your reply, is it possible that draining the system to change the rad showed this problem up, or made it worse?

I take it that to replace this it is take the diverter valve out and then the number of screws on the circly thingy hold the diaphram in place?

a) No.

b) Usually do them in situ, but we have serious toolkits. Get a copy of the manual anyway.

So is it just coincidence that this happened after draining system?