Sime Gas boiler - acting up...any advice please?

Trishis

Hiya,

My gas boiler keeps cutting out and making a loud bubbling noise...anyone know why this may be?...

It was doin the same thing this time last year and I got bord gais out to look at it...but beleive it or not they made it worse and it wouldn't work at all...so after an end bill of 450 euro I dont really want to go doen that routwe again....they ended up not making it any better and causing a lot of headaches!

Anyway know another route I could take by any chance?

Really appreciated, boiler is in my bedroom and the noise is awful! Plus its been reset so many times now that I'm afraid its gonna catch fire or something.....

Pete67

It sounds like the system is low on water, or the circulating pump is not running. The bubbling noise is probably water boiling in the heat exchanger. It may be tripping out the high temp limit safety device requiring manual reset. I'd strongly recommend that you stop using it until this is resolved as overheating the boiler can cause expensive damage to boiler components. The boiler safety devices also need to be checked as the boiler should not attempt to fire under these conditions. Depending on the boiler either a low water pressure switch or a flow switch (or both) should inhibit the boiler ignition sequence. However I have seens many installations where the boiler low pressure switch has been disabled, paticularly when the heating system is filled from a roof tank via a check valve, rather than from the mains via a filling loop.

You can find a qualified gas installer who will look at your heating system here

Savage_Henry

I have low pressure in the boiler (sime systemformat) orange light flashing. which one is the water filling loop valve? I can see one black knob that is for bleeding then there is what looks like a valve without a knob and one red (will turn only slightly, if you let it go, it will turn back to previous position) (pressure release?)

JohnnieK

The filling loop has a quarter turn black knob on it with a silver flexible hose and a non-return valve on it (some have what looks like a rad valve head on them). If it's not near the boiler it will be in the hot press. If you can not see it look in your hot press and look for a 1/2" pipe coming from the ceiling down to and connecting into the heating coil on your cylinder, this will be the top-up feed coming from the attic either conected to the mains or from the tank. There should be a valve on this.

You should look at why the system dropped in the first place. It's possible the safety valve on the boiler is passing and needs to be replaced.

Jjames

I had the sime gas boiler.it 's green led start flashing from yesterday . I switch off and turn on only few mins it's turn flashing again and boiler stop noise too. I try to switch on n off few time .it keep end with green led flashing , water pressure is 1 bar. Can anybody know what is happened? Cheers