Worcester 350 diverter valve? HW off, but still it comes!

[nv_london]

Dear all,

two related questions for you:

1) Does a Worcester 350 combi boiler have a diverter valve (stupid question I know, but I can't find a spare part for it?! Is it called something else?)

2) When I switch the HW switch off on the front of the boiler, HW keeps coming from the taps! (everything was working fine a month or so aga, so I don't think it's wired up incorrectly etc, I think something is jammed not working).

Any ideas would be of great help.

Many thanks.

 

[Terrywookfit]

1. No it's called A pump!

2. Do you mean that your taps dont turn off??

 

[nv_london]

1) is that because there's two seperate pumps on the 350 (one for HW and CH?) i.e. no diverter required (or am I just making things up again?)

2) No, sorry, I mean that if I flick the HW switch on the front of the boiler to off, but then turn the HW taps on, I still get HW coming from the taps.

Thanks for any further suggestions!

 

[Terrywookfit]

Yes two pumps no divertor!!

Unless some one has been "playing" with the electics, failure to isolate with the switch must be a faulty switch!!

Not really a problem unless the flow switch sticks!!

 

[nv_london]

Many thanks Terrywookfit.

Nobody has been playing with the electrics, of that I'm sure.
However, could you tell me what a flow switch is (it's purpose etc) and what would happen if it were faulty?

Many thanks.

 

[Terrywookfit]

It tells the boiler there is a demand for hot water!!