low pressure reset switch?

[craig]

Hi,

I have a saunier duval system 400 boiler. Came home today and the low pressure light was on. Did a radiator bleed and re-pressurised the system, but the light won't go off. I'm guessing there is a reset switch I need to hit? Does anyone know where it might be hidden? I have no manual :(

Thanks.

Craig

[William McNicol]

No idea if you've looked here: >

> the one I picked (I didn't see your model) showed a little depressed reset switch just under the red fault light....

Cheers,

william.

[craig]

Hi William,

is it like a plastic x-shaped rod within a plastic round, threaded cylinder? If so, I found that, but it didn't 'press' :(

Craig

[craig]

Have taken a pic of the switch.

a bit mashed up so could be dodgy. As I said, I can press it but it doesn't click.

Craig

[craig]

D'oh, just realised it should be jutting out eh? Well, it's not, and the low pressure light is on, even though there is just over 1.5 bar in the system, cold. Sounds like it's engineer time.

Craig

[Roger Mills]

That look just like the over-heat trip switch on my (different make/model) boiler. When it trips, the central part pops out (which yours doesn't appear to have done) and has to be pressed in again.

[Tim Downie]

I assume you've tried turning the boiler mains off and on again?

Tim

[craig]

Yeah, cut all power to the flat. Only left it 30 seconds though, might try a bit longer.

Cheers.

[craig]

Okay, had all power off for a good ten minutes that time, still no joy.

Craig

[Tim Downie]

Yeah, cut all power to the flat. Only left it 30 seconds though, might try a bit longer.

Cheers.

[Tim Downie]

Well if your boiler is anything like this one

it doesn't seem it should need any sort of resetting for low pressure. It comes down to a pressure sensor fault or a PCB problem.

Tim

[geoff]

In message , Roger Mills writes

wot e sed

[craig]

yeah, but if it ain't popped, I can't press it. oh well, popper must be busted!

hopefully got someone seeing it tomorrow. will post back results.

Thanks.

[Roger Mills]

No! It ain't popped because it's an overheat trip, and your boiler hasn't overheated.

This button is *not* related to your pressure problem.

[craig]

Hi Roger,

Thanks for clarifying, I thought it was a generic reset as that's how it seems to be described in most places!

Craig

[craig]

I said I'd post back the result so here it is. The pressure switch was fine. There was a blockage at the vessel leading to the switch.

Thanks all.

Craig