Worcester Bosch 230 Combi RSF Boiler; Water Pressure Problem

[Dave]

I live in a hard water area, and use a Liff water conditioner to stop it furring up. So far I think its worked! I also use de-scaler in the radiators to prevent blockage.

I have a strange problem that I think is to do with a pressure switch. When I want to use the hot water upstairs its fine, it come on immediately and piping hot. However when I want to use the water downstairs in the kitchen (at the same level as the boiler) it won't fire up. I remember that was intermittent last year and has slowly got worse. I have the Installation & Service Instructions to hand (grabbed them out of the bin from the installer) The Combi Boiler is about 10 Years old.

I think it may have something to do with water back pressure or water pressure sensor.

Thanks in advance

David

[Peter Gray]

What's the flow rate like from the ground floor tap? Is it possible you have a problem with the tap or its connections, leading to a low flow rate from it?

Peter

[Dave]

Thank you Peter Gray for that response.

I dis-assembled the ¼ turn-tap on the downstairs kitchen sink.

I found that some sediment had built up on the pronged plastic filter mechanism of the tap assembly.

An application of a small flat bladed screwdriver, light force and ignorance sorted out that problem.

No I have full flow and an Autostart Combi-Boiler (and a much happier girlfriend, now the dished are done more regularly)

Dave